Tag: M.W=150-200

Sherbrook, Evan M.; Jung, Hoimin; Cho, Dasol; Baik, My-Hyun; Yoon, Tehshik P. published the artcile< Bronsted acid catalysis of photosensitized cycloadditions>, Application In Synthesis of 17082-09-6, the main research area is imidazolylpropenone preparation alkene ruthenium Bronsted acid catalyst photochem cycloaddtion; imidazolylcarbonyl cyclobutane preparation diastereoselective.

Authors showed that Bronsted acids can also modulate the reactivity of excited-state organic reactions. Bronsted acids dramatically increase the rate of Ru(bpy)32+-sensitized [2 + 2] photocycloadditions between C-cinnamoyl imidazoles and a range of electron-rich alkene reaction partners. A combination of exptl. and computational studies supported a mechanism in which the Bronsted acid co-catalyst accelerates triplet energy transfer from the excited-state [Ru*(bpy)3]2+ chromophore to the Bronsted acid activated C-cinnamoyl imidazole. Computational evidence further suggested the importance of driving force as well as geometrical reorganization, in which the protonation of the imidazole decreases the reorganization penalty during the energy transfer event.

Chemical Science published new progress about [2+2] Cycloaddition reaction, stereoselective (photochem.). 17082-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H7ClO, Application In Synthesis of 17082-09-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Wei, Bo; Mei, Qiong; An, Zexiu; Li, Mingxue; Qiu, Zhaoxu; Bo, Xiaofei; He, Maoxia published the artcile< Nonmetal-Doped C2N Nanosheets for Removal of Methoxyphenols: A First-Principles Study>, Recommanded Product: 4-Chloro-2-methoxyphenol, the main research area is nonmetal doped carbon nitride nanosheet removal Methoxyphenol DFT photocatalyst.

Through first-principles d. functional theory study on the optical, electronic, and adsorption characteristics of pure and three different nonmetal elements (B, P, and S)-doped C2N nanosheets, the effects of doping on photoelectronic and adsorption properties of these potential photocatalysts were determined Three main doping modes (d1, d2, and I3) were determined on the basis of the defect formation energy. The introduction of B, P, and S dopants resulted in more suitable band structures and broadened light absorption and generally promoted carrier migration of C2N materials. Remarkably, the B@d1 and P@d1 modes C2N have broadened light absorption, spatially separated e–h+ pairs, fast carrier migration, and excellent redox ability. They are strongly recommended for the photocatalytic water splitting and pollutant degradation In addition, the adsorption capacity of B@d1 and P@d1 modes C2N for pollutants was enhanced. Our computational results could provide some potential strategies for improving their photocatalytic characteristics and provide guidance for further exploration of the utilization of two-dimensional C2N materials.

ACS Applied Nano Materials published new progress about Absorption spectra. 16766-30-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C7H7ClO2, Recommanded Product: 4-Chloro-2-methoxyphenol.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Thanneeru, Srinivas; Li, Weikun; He, Jie published the artcile< Controllable Self-Assembly of Amphiphilic Tadpole-Shaped Polymer Single-Chain Nanoparticles Prepared through Intrachain Photo-cross-linking>, HPLC of Formula: 17082-09-6, the main research area is assembly control amphiphilic tadpole diblock polymer single chain nanoparticle; cinnamoyl crosslinking photochem assembly micelle morphol.

We report the use of intramol. crosslinking chem. as a tool to control the self-assembly of amphiphilic diblock copolymers (di-BCPs). Two amphiphilic di-BCPs of poly(N,N’-dimethylacrylamide)-block-polystyrene (PDMA-b-PS) with photo-cross-linkable cinnamoyl groups in either hydrophobic or hydrophilic blocks were prepared using reversible addition-fragmentation chain transfer polymerization Intramol. photo-crosslinking of cinnamoyl groups led to the formation of tadpole-shaped polymer single-chain nanoparticles (SCNPs) consisting of a self-collapsed block as the “”head”” and an un-cross-linked block as the “”tail””. When intramol. photo-crosslinking was carried out in hydrophobic PS blocks, a clear morphol. transition from branched cylindrical micelles (for the linear di-BCP) to completely spherical micelles at a dimerization degree of ∼63% was observed A pattern of morphol. transitions from cylindrical micelles to spherical micelles is observed through stepwise downsizing the length of cylindrical micelles when increasing the self-collapse degree of PS blocks, whereas, in case of photo-crosslinking carried out in hydrophilic PDMA blocks, the size of micelles showed a dramatic increase due to the shift of hydrophobic-to-hydrophilic balance. When the crosslinking degree of PDMA blocks reached >60%, tadpole-shaped SCNPs assembled into nonconventional aggregates with a nonsmooth surface. Our results illustrate the impact of chain topologies on the self-assembly outcomes of amphiphilic di-BCPs, which likely opens a door to control the micellar morphologies from just one parent linear di-BCP, rather than resynthesizing BPCs with different volume fractions of the two blocks.

Langmuir published new progress about [2+2] Photocycloaddition reaction. 17082-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H7ClO, HPLC of Formula: 17082-09-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Joseph, Devaneyan; Lee, Sunwoo published the artcile< Reaction of Amide and Sodium Azide for the Synthesis of Acyl Azide, Urea, and Iminophosphorane>, Related Products of 17082-09-6, the main research area is acyl azide sym aromatic urea iminophosphorane preparation; amide sodium azide phosphine substitution Curtius rearrangement.

Amides reacted with NaN3 to give the acyl azides in DMF at 25°C and produce the sym. ureas in THF/H2O at 80°C via the sequential reaction of acyl substitution and Curtius rearrangement. All acyl azides were also obtained from the secondary amides via sequential reaction of p-toluenesulfonyl chloride and NaN3. In addition, keto-stabilized iminophosphoranes were prepared from a one-pot reaction of amides, NaN3, and phosphines.

Organic Letters published new progress about Acyl azides Role: SPN (Synthetic Preparation), PREP (Preparation). 17082-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H7ClO, Related Products of 17082-09-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Acharya, Badri Narayan; Ghorpade, RamaRao; Singh, Kshetra Pal; Kumar, Deo; Nayak, Sabita published the artcile< Synthesis and muscarinic acetylcholine receptor (mAChR) antagonist activity of substituted piperazine-triazoles>, Synthetic Route of 611-19-8, the main research area is dibenzyltriazolyl methyl piperazine preparation muscarinic acetylcholine receptor antagonist SAR; benzyltriazolyl methylpiperazinylchlorobenzonitrile preparation muscarinic acetylcholine receptor antagonist SAR docking.

This study described synthesis of a series of piperazine-triazole derivatives and their ex vivo evaluation for preliminary muscarinic acetylcholine receptor (mAChR) blocking activity on rat ileum model. A mol. based on benzonitrile piperazine triazole scaffold showed good tissue relaxation and blocking of neurotransmitter ACh in the ex vivo experiment

Monatshefte fuer Chemie published new progress about Aralkyl chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 611-19-8 belongs to class chlorides-buliding-blocks, and the molecular formula is C7H6Cl2, Synthetic Route of 611-19-8.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Profit, E.; Solf, G. published the artcile< Chlorothiophenes>, COA of Formula: C5H2Cl2O2S, the main research area is .

The four isomeric dichlorothiophenes, 2,3- (I), 2,4- (II), 3,4- (III), and 2,5-dichlorothiophenes (IV), were examined relative to their reactivities in the Friedel-Crafts reaction. With β-chloropropionyl chloride (V), the resp. isomeric chloro ketone was synthesized in high yield. They showed local anesthetic activity about 5 times as strong as cocaine and about one half as strong as Falicain. The preparation of the four isomeric dichlorothiophenecarboxaldehydes in good yields was described. The chem. characteristics of 2,3-dichloro-5-acetylthiophene (VI) were studied. Some of the reactions of 2,3,5-trichlorothiophene (VII) were also studied. 2,3-Dichloro-4,5-thiophenedicarbox-aldehyde (0.5 g.) in 30 ml. 50% alc. refluxed 5 min. with 0.3 g. N2H4·H2O gave 0.3 g. 2,3-dichlorothieno[4,5-d]pyridazine, m. 194-5°. I (7.7 g.) and 8.1 g. V in 150 ml. CS2 treated under stirring and cooling with 7 g. AlCl3, then stirred 2 hrs. at room temperature, and decomposed gave 11.6 g. β-chloroethyl 2,3-dichloro-5-thienyl ketone (VIII), m. 67-8°. The following IX and their thiosemicarbazones or hydrazones were similarly obtained (R, % yield, m.p., derivative, and m.p. of derivative given): Me, 96, 66°, thiosemicarbazone, 217-18°; Et, 86, 56-7°, thiosemicarbazone, 184-6°; Pr, 78, 32-3°, thiosemicarbazone, 161°; Ph, 68, 62-3°, p-nitrophenylhydrazone, 201-3°; PhCH2, 93, 93°, p-nitrophenylhydrazone, 235-7°. VIII (1.2 g.) in 3.5 ml. alc. refluxed 10 hrs. gave 0.7 g. β-ethoxyethyl 2,3-dichloro-5-thienyl ketone, m. 17.5°. VIII (1.2 g.) in 3 ml. AcOH heated several minutes with 0.65 g. KOAc gave 1.3 g. β-acetoxyethyl 2,3-dichloro-5-thienyl ketone, m. 55-6°. VIII (1.2 g.) kept several days with 10 ml. C5H5N gave 1.1 g. IX (R = β-pyridiniumethyl chloride), m. 184-5° (decomposition). VIII (1.2 g.) in 10 ml. MeOH refluxed a short time with 0.6 g. KOAc, cooled, 0.7 g. α-naphthylamine in 10 ml. alc. added, and the mixture kept a short time gave 0.9 g. IX [R = β-(α-naphthylamino)ethyl] (X), m. 83-4°. IX.HCl (R = R1CH2CH2) (XI) were obtained by the following procedures: (A) As in the preparation of X the reaction mixture was poured into dilute HCl, unreacted ketone removed with Et2O, the aqueous solution made alk., extracted with Et2O, and the dried ethereal solution treated with dry HCl. (B) VI (3.9 g.), 0.025 mol. secondary amine-HCl, and 1 g. paraformaldehyde in 20 ml. alc. containing 2 drops concentrated HCl was refluxed 12 hrs. The following XI were thus obtained (R1, % yield, and m.p. given): Me2N, 60, 201-2°; Et2N, 74, 124-6°; piperidino, 77, 196-7°; 4-methylpiperidino, 59, 189-90°; 4-ethylpiperidino, 93, 197-8°; 4-propylpiperidino, 63, 199°; morpholino, 94, 208-10°. VIII (1.2 g.) in 10 ml. alc. refluxed with 0.35 g. KCN in 3 ml. H2O gave 1 g. IX (R = CH2CH2CN) (XII), m. 124-5° (cyclohexane). XII (1 g.) in 20 ml. concentrated HCl refluxed 4 hrs. gave IX (R = CH2CH2CO2H) (XIII), m. 120-1°. VIII (1.2 g.) in 3 ml. alc. refluxed with 0.7 g. NH2OH.HCl and 0.85 g. KOH in 5 cc. H2O gave 1.1 g. N,N-bis[β-(2,g-dichloro-5thenoyl)ethyl]hydroxylamine, m. 159-60°. 2,3-Dichloro-5chloroacetylthiophene (XIV), m. 61-2°, was prepared in 84% yield. XIV (1.15 g.) in 15 ml. C5H5N kept 1 day gave quant. IX (R = pyridiniummethyl chloride). XIV (2.3 g.) in 15 ml. alc. treated under cooling with 1.7 g. ammonium dithiocarbamate in alc. and kept 4 days at room temperature gave 2.3 g. 2-mercapto-4-(2,3-dichlorothien-5-yl)thiazole,m. 181-2°. I (0.05 mole) and 0.05 mole dicarboxylic monoester monochloride in 80 ml. CS2 treated under ice-cooling with 7.2 g. AlCl3, then stirred 3 hrs. at room temperature, and poured over ice gave the following XV (R, n, % yield, and m.p. given): Et, 0, 30, 57°; Me, 2, 44, 65-6°; Me, 3, 62, 67-8°; Me, 4, 47, 63-4°. XV refluxed in dilute aqueous KOH gave a nearly quant. yield of the corresponding acid (XVI) (n, % yield, and m.p. given): 0, quant., 126-7°; 2, quant., 120-1°; 3, quant., 113-15°; 4, quant., 93-4°; 5, 14, 86-8°. I (7.7 g.) and 3.9 g. succinoyl chloride in 50 ml. CS2 treated at -12° with 7 g. AlCl3, kept 40 min. at -10°, decomposed with ice, and the solids collected gave 0.6 g. 1,4-bis(2,3-dichloro-5-thienyl)-l,4- butanedione, m. 188-90°. 2,3-Dichloro-5-thenoylpropionic acid was obtained in 23.8% yield from the filtrates upon acidification. Similarly, 7.7 g. I and 4.5 g. glutaryl chloride with AlCl3 gave 4 g. 1,5-bis(2,3-dichloro-5-thienyl)-1,5-pentadione, m. 115°; thiosemicarbazone (21% yield) m. 220-2° (decomposition). 1,6Bis(2,3-dichloro-5-thienyl)-1,6-hexanedione, 82% yield, m. 133°, and 1,7-bis(2,3-dichloro-5-thienyl)heptane-1,7-dione, 42% yield, m. 74-5°, were similarly prepared The latter also afforded 14% 2,3-dichloro-5-thienylcaproic acid from the acidified filtrate. 2,3Dichloro-5-acetylthiophene semicarbazone m. 264-6°. VI (17.7 g.) treated with 10 g. (iso-PrO)3Al in 50 ml. iso-PrOH gave 14.5 g. α-(2,3-dichloro-5-thienyl)ethylcarbinol, b0.2 93-4°. VI (19.5 g.) added at 70° to 43 g. NaOH in 55 ml. H2O into which 32 g. Cl had been previously passed, the mixture stirred, treated with 10 g. NaHSO3, and the product acidified with concentrated HCl gave 16.2 g. 2,3-dichloro-5-thiophenecarboxylic acid (XVII), m. 194-6°. XVII (14 g.), 45 g. quinoline, and 4 g. Cu powder refluxed 2 hrs. under N gave 7.4 g. I, b10 55°,n20D 1.5651. I(5.1g.) in 50 cc. CS2 treated with 4.4 g. AlCl3 under ice-cooling, and the mixture treated in 10 min. with Cl2CHOMe, warmed 5 min. at 50°, and decomposed gave 4.85 g. 2,3-dichloro-5-thiophenecarboxaldehyde (XVIII), m. 56°. XVIII (1.81 g.) in 20 ml. MeOH treated with 2.3 g. dianilinoethane in 40 ml. MeOH gave 1.7 g. 1,3-diphenyl-2- (2,3-dichloro-5-thienyl)tetrahydroimidazole, m. 126-6.5°. VI (9.8 g.) refluxed 4 hrs. with 6 g. SeO2 in dioxane and kept overnight gave 7.9 g. 2,3-dichloro-5-thienylglyoxal (XIX), m. 94 5°; oxime m. 160°; semicarbazone m. 135-7°; thiosemicarbazone m. 191° (decomposition). XIX (0.22 g.) and 0.1 g. o-C6H4(NH2)2 in 5 ml. 50% alc. afforded an almost quant. yield of 2-(2,3-dichloro-5-thienyl)quinoxaline, m. 209-10°. VI (19.5 g.) kept 3 days at room temperature with 40 g. Zn-Hg and 80 ml. 5% HCl and refluxed 1 hr. with 10 ml. concentrated HCl gave 5.5 g. 2-ethyl-4chlorothiophene (XX), b14 67-8°, n20D 1.5399. XX (2 g.) treated in the cold with 4 ml. fuming HNO2 and 4 ml. Ac2O, shaken 2 hrs. at 0°, and distilled gave 1.9 g. 2-nitro-3-chloro-5-ethylthiophene, b14 158-60°. VI (19.5 g.) and 20 ml. 84% N2H4·H2O heated with 80 ml. (CH2OH)2, refluxed, H2O distilled until temperature reached 165°, treated at 90 o with 20 g. KOH, refluxed 1.5 hrs., and fractionated gave 2.4 g. 3-chloro-5-ethylthiophene, b14 67-8°, and 4.2 g. 2,3dichloro-5-ethylthiophene, b13 87-90°, n22D 1.5458. I (115 g.) in 200 ml. C6H6 treated with Na Hg amalgam gave 71 g. unchanged I and 6.3 g. 3-chlorothiophene (XXI), b. 135-7°. XXI (1.18 g.) and 0.9 g. AcCl in 20 ml. CS2 treated in the cold with 1.5 g. AlCl3 gave 1.2 g. 3-chloro-2-acetylthiophene (XXII), b15 117-18°. XXII treated with NaOCl in alk. solution gave 3-chlorothiophene-2-carboxylic acid (XXIIa), m. 183-5°. XXI (2.9 g.) and 3.7 g. HCONMe2 treated with 7.5 g. POCl3 gave 1.3 g. 3-chlorothiophene-2-carboxaldehyde (XXIII), b14 100-1°; semicarbazone m. 214-16°; thiosemicarbazone m. 213-14°. XXIII oxidized with KOH-H2O2 gave XXIIa. I (15.3 g.) and 24 ml. Ac2O treated at -20° with 20 ml. fuming HNO3 and 25 ml. Ac2O gave 11.7 g. 2,3-dichloro-5-nitrothiophene (XXIV), m. 56° XXIV (2 g.) in 10 ml. MeOH kept 1 hr. with 2 g. KOH in 20 ml. MeOH gave 0.7 g. 2-methoxy-3-chloro-5-nitrothiophene, m. 62°. XXIV (1 g.) in 20 ml. alc. left 16 hrs. at room temperature with 0.85 g. piperidine gave 0.8 g. 2-piperidino-3-chloro-5-nitrothiophene, m. 57-8°. Similarly, 1 g. XXIV and 1 g. 4-ethylpiperidine gave an almost quant. yield of 2-(4-ethylpiperidino)-3-chloro-5-nitrothiophene, m. 6970°. XXIV (1 g.) and 0.9 g. morpholine in alc. gave an almost quant. yield of 2-morpholino-3-chloro-5-nitrothiophene, m. 1045°. XXIV (1 g.) in 10 ml. alc. treated 15 min. with 1.1 g. PhSH and 1 g. NEt3 gave 0.9 g. 2-phenylthio-3-chloro-5-nitrothiophene, m. 96-7°. Similarly prepared were 53% 2-(p-tolylthio)-3chloro-5-nitrothiophene, m. 81-2°, and almost quant. 2-(pchlorophenylthio)-3-chloro-5-nitrothiophene, m. 93-4°. XXIV (5 g.) and 20 g. Zn granules stirred 2 hrs. at room temperature with 100 ml. concentrated HCl followed by acetylation gave 2.1 g. 3-chloro-5 acetamidothiophene (XXV), m. 191-2°. XXIV was similarly converted into 3-chloro-5-propionylaminothiophene (XXVI), m. 159°. XXV (1.8 g.) in 20 ml. Ac2O treated under stirring at -20° with 12 ml. fuming HNO3 and 15 ml. Ac2O, stirred 1 hr. at -10°, and stirred until the temperature reached 5° gave 1.3 g. 2,4dinitro-3-chloro-5-acetamidothiophene, m. 239-40°. XXVI similarly gave 92% 2,4-dinitro-3-chloro-5-propionylaminothiophene, m. 164-5°. A mixture of II and III (40 g.) in 1600 ml. alc. kept 4 weeks with 850 ml. cold saturated HgCl2 and 90 ml. 33% NaOAc gave 2,4-dichloro-5-chloromercurithiophene (XXVII), m. 183-5°. Crude XXVII dissolved in 400 ml. 2N HCl and steam distilled gave II, b12 54°, n20D 1.5660. II (1 g.), 0.7 g. ClCH2COCl, and 10 ml. CS2 treated with cooling with 1 g. AlICl3 gave 0.8 g. 2,4-dichloro-5-chloroacetylthiophene, m. 76-7°. The following 2,4-dichloro analogs of IX were similarly prepared (R, % yield, m.p., derivative, and m.p. derivative given): Me, 78, 35°; thiosemicarbazone, 215-16° (decomposition); Et, 87, 53°; thiosemicarbazone 169-70° (decomposition); Ph, 73, 32.5-33°, 2,4-dinitrophenylhydrazone, 225-7° (decomposition); PhCH2, 56, 29-30°, 2,4-dinitrophenylhydrazone, 185-7° (decomposition); CH2CH2Cl, 88, 40.5-1.5°, -, -. II (5.1 g.), 4 g. Cl2CHOMe, 40 ml. CS2, and 4.4 g. AlCl3 gave 5 g. 2,4-dichlorothiophene-5-carboxaldehyde (XXV-III), m. 35-6°; oxime m. 144-6°; semicarbazone m. 244-6°; thiosemicarbazone m. 238-40° (decomposition); p-nitrophenylhydrazone m. 264-6° (decomposition); nitromethylene derivative m. 90-1°. Oxidation of XXVIII with perhydrol in aqueous KOH gave quant. 2,4-dichlorothiophene-5-carboxylic acid, m. 186-7°. Nitration of II with fuming HNO3 in Ac2O at -15° gave 63% 2,4-dichloro-5-nitrothiophene (XXIX), b14 119°. XXIX was further nitrated with fuming HNO3 and H2SO4 to give 70.4% 2,4-dichloro-3,5-di-nitrothiophene, m. 97-8°. III (3 g.) and 2 g. ClCH2COCl in 20 ml. CS2 treated in the cold with 2.8 g. AlCl3 gave 4.2 g. 2-chloro-acetyl-3,4-dichlorothiophene, m. 70-1°. The following 2-acyl-3,4-dichlorothiophenes were obtained (R in 2-COR, % yield, m.p., derivative, and m.p. derivative given): Me, 87, 54°, thio-semicarbazone, 171-2°; Et, 71, 68°, thiosemicarbazone, 156-7°; Pr, 69, 43°, thiosemicarbazone, 114-15°; Ph, 67, 97-7.5°, 2,4-dinitrophenylhydrazone, 202-4° (decomposition); PhCH2, 68, 77-8°, 2,4-dinitrophenylhydrazone, 181-3° (decomposition); ClCH2CH2, 88, 61-2°, -, -. β-Chloroethyl 3,4-dichloro-2-thienyl ketone (1.2 g.) and 0.5 g. KOAc in 10 ml. MeOH refluxed a short time, then 10 min. with 0.5 g. morpholine, and treated with 60 ml. 4N HCl gave 1.5 g. β-morpholinoethyl 3,4-dichloro-2-thienyl ketone-HCl, m. 197-9°. III (5.1 g.) in 20 ml. Ac2O treated at -20° with 5 ml. fuming HNO3 and 10 ml. Ac2O gave 5.5 g. 2-nitro-3,4-dichlorothiophene (XXIXa), m. 72°. XXIXa (0.55 g.) in 10 ml. fuming HNO3 and concentrated H2SO4 gave 0.55 g. 2,5-dinitro-3,4-dichlorothiophene, m. 123-4°. III (5.1 g.), 4 g. Cl2CHOMe, and 4.4 g. AlCl3 in 40 ml. CS2 gave 3.4 g. 3,4-dichlorothiophene-2-carboxaldehyde (XXX), m. 61-2°; oxime m. 1513°; semicarbazone m. 257-8° (decomposition); thiosemicarbazone m. 226-8° (decomposition). Oxidation of XXX with perhydrol-KOH gave an almost quant. yield of 3,4-dichlorothiophene-2-carboxylic acid, m. 187-8°. III (5.1 g.) treated dropwise in 10 min. with 15 ml. 30% oleum, stirred 1 hr. at room temperature, poured on ice, and the crude product treated with PCl5 4 hrs. at 140° gave 6.5 g. 3,4-dichlorothiophene-2,5-bis(sulfonyl chloride) (XXXI), m. 13840°. XXXI (3.5 g.) refluxed 15 min. with 50 ml. concentrated NH4OH gave 1.8 g. 3,4-dichlorothiophene-2,5-disulfonamide, m. 278-80° (decomposition). IV (15.3 g.), 16.2 g. V, and 14 g. AlCl3 in 100 ml. CS2 stirred 5 hrs. gave 15.6 g. β-chloroethyl 2,5-dichloro-3-thienyl ketone (XXXII), m. 33-4°. XXXII (1.2 g.) in 10 ml. alc. heated with 0.3 g. KCN in 3 ml. H2O gave 1.15 g. the β-cyanoethyl analog (XXXIII), m. 67-8°. XXXIII (1.15 g.) in 40 ml. concentrated HCl refluxed 4 hrs. gave 0.2 g. β-(2,5-dichloro-3-thenoyl)propionic acid, m. 116-17°. The following 2,5-dichloro-3-thienyl βaminoethyl ketone-HCl salts were prepared as described above (R of the β-COCH2CH2R group, % yield, and m.p. given): piperidino, 91, 188-9°; 4-methylpiperidino, 71, 184-6°; 4-ethylpiperidino, 70, 183-5°; 4-propylpiperidino, 73, 167-9°; morpholino, 85, 194-6°. IV (15.3 g.), 14 g. AlCl3, and 11.5 g. Cl2CHOMe in 100 ml. CS2 gave 6.3 g. 2,5-dichlorothiophene-3-carboxaldehyde, m. 24-4.5% b15 105-6°; oxime m. 129-31°. VII (62 g.) treated 17 hrs. with 7.8 g. AcCl and 14 g. AlCl3 gave 7.1 g. 2,3,5-trichloro-4-acetylthiophene, m. 79°; thiosemicarbazone m. 230-3° (decomposition). The following compounds were similarly prepared: 47% 2,3,5-trichloro-4-propionylthiophene, m. 55-6° [thiosemicarbazone m. 215-16° (decomposition)]; 6% 2,3,5-trichloro-4 butyrylthiophene, m. 34° [thiosemicarbazone m. 178-9° (decomposition)]; 11% 2,3,5-trichloro-4-phenacylthiophene, m. 119°.

Journal fuer Praktische Chemie (Leipzig) published new progress about Reactivity (chemical). 31166-29-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C5H2Cl2O2S, COA of Formula: C5H2Cl2O2S.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Solas, Marta; Suarez-Pantiga, Samuel; Sanz, Roberto published the artcile< Asymmetric Gold(I)-Catalyzed Tandem Hydroarylation-Nazarov Cyclization: Enantioselective Access to Cyclopentenones>, Quality Control of 17082-09-6, the main research area is cyclopentachromenone preparation enantioselective; alkenynone asym gold catalyst tandem antiMichael hydroarylation nazarov cyclization; Asymmetric Catalysis; Cyclopentenones; Gold; Hydroarylation; Nazarov Cyclization.

The asym. synthesis of cyclopentachromenones from gold-catalyzed reaction of readily available skipped alkenynones is described. This cascade reaction involves an initial anti-Michael hydroarylation of the ynone moiety to form a gold-functionalized dialkenylketone intermediate, followed by a Nazarov cyclization that proceeds in an unprecedented enantioselective manner. Excellent enantiomeric ratios and chem. yields are obtained under mild reaction conditions.

Angewandte Chemie, International Edition published new progress about Alkenynes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 17082-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H7ClO, Quality Control of 17082-09-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Mao, Qianhui; Ji, Feng; Wang, Wei; Wang, Qiquan; Hu, Zhenhu; Yuan, Shoujun published the artcile< Chlorination of parabens: reaction kinetics and transformation product identification>, SDS of cas: 3964-57-6, the main research area is paraben methylparaben chlorination kinetics; Chlorination; Kinetics; Mechanism; Parabens; Pathway; Transformation products.

The reactivity and fate of parabens during chlorination were investigated in this work. Chlorination kinetics of methylparaben (MeP), ethylparaben (EtP), propylparaben (PrP), and butylparaben (BuP) were studied in the pH range of 4.0 to 11.0 at 25 ± 1 °C. Apparent rate constants (kapp) of 9.65 × 10-3 M-0.614·s-1, 1.77 × 10-2 M-1.019·s-1, 2.98 × 10-2 M-0.851·s-1, and 1.76 × 10-2 M-0.860·s-1 for MeP, EtP, PrP, and BuP, resp., were obtained at pH 7.0. The rate constants depended on the solution pH, temperature, and NH4+ concentration The maximum kapp was obtained at pH 8.0, and the min. value was obtained at pH 11.0. The reaction rate constants increased with increasing temperature When NH4+ was added to the solution, the reaction of parabens was inhibited due to the rapid formation of chloramines. Two main transformation products, 3-chloro-parabens and 3,5-dichloro-parabens, were identified by GC-MS and LCMS-IT-TOF, and a reaction pathway was proposed. Dichlorinated parabens accumulated in solution, which is a threat to human health and the aqueous environment.

Environmental Science and Pollution Research published new progress about Chemical oxygen demand. 3964-57-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H7ClO3, SDS of cas: 3964-57-6.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Granchi, Carlotta; Lapillo, Margherita; Glasmacher, Sandra; Bononi, Giulia; Licari, Cristina; Poli, Giulio; El Boustani, Maguie; Caligiuri, Isabella; Rizzolio, Flavio; Gertsch, Jurg; Macchia, Marco; Minutolo, Filippo; Tuccinardi, Tiziano; Chicca, Andrea published the artcile< Optimization of a Benzoylpiperidine Class Identifies a Highly Potent and Selective Reversible Monoacylglycerol Lipase (MAGL) Inhibitor>, COA of Formula: C8H7ClO3, the main research area is benzoylpiperidine monoacylglycerol lipase inhibitor optimization antitumor.

Monoacylglycerol lipase (MAGL) is the enzyme degrading the endocannabinoid 2-arachidonoylglycerol, and it is involved in several physiol. and pathol. processes. The therapeutic potential of MAGL is linked to several diseases, including cancer. The development of MAGL inhibitors has been greatly limited by the side effects associated with the prolonged MAGL inactivation. Importantly, it could be preferable to use reversible MAGL inhibitors in vivo, but nowadays only few reversible compounds have been developed. In the present study, structural optimization of a previously developed class of MAGL inhibitors led to the identification of compound 23, which proved to be a very potent reversible MAGL inhibitor (IC50 = 80 nM), selective for MAGL over the other main components of the endocannabinoid system, endowed of a promising antiproliferative activity in a series of cancer cell lines and able to block MAGL both in cell-based as well as in vivo assays.

Journal of Medicinal Chemistry published new progress about Antiproliferative agents. 85740-98-3 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H7ClO3, COA of Formula: C8H7ClO3.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Zhu, Ming-Ming; Fang, Yu; Chen, Yan-Chen; Lei, Yu-Qing; Fang, Li-Feng; Zhu, Bao-Ku; Matsuyama, Hideto published the artcile< Antifouling and antibacterial behavior of membranes containing quaternary ammonium and zwitterionic polymers>, Quality Control of 1592-20-7, the main research area is antifouling antibacterial membrane; Antibacterial; Antifouling; Membrane; Quaternary ammonium; Zwitterionic polymer.

To overcome the organic-/bio- fouling of the membrane, a dual-functional ultrafiltration membrane containing quaternary ammonium and zwitterionic polymers via quaternization and surface radical polymerization was designed, and its antifouling and antibacterial behavior was studied. In this work, poly(vinylidene fluoride)/poly(Me methacrylate-co-dimethylamino-2-Et methacrylate) (PVDF/P(MMA-co-DMAEMA)) blend membrane was quaternized by p-chloromethyl styrene (p-CMS), and the double bonds were introduced onto the membrane surface, which further participated in the polymerization of zwitterionic monomers on the membrane surface. The results indicated that the resultant membrane exhibited obviously improved hydrophilicity and weak pos. charge (isoelec. point, 7.49). The membrane presented higher flux recovery ratio and lower protein adhesion compared with the pure PVDF membrane. Meanwhile, the membrane showed high-efficiency broad-spectrum antibacterial performance, i.e., the bacteria killing efficiency of S. aureus and E. coli reached 98.2% and 97.0%, resp. Moreover, the membrane effectively inhibited bacterial adhesion, which is important for the long-term antibacterial properties of membrane. This antifouling and antibacterial PVDF membrane may have potential in the long-term filtration process, especially when dealing with microbiol. contaminated water.

Journal of Colloid and Interface Science published new progress about Antibacterial agents. 1592-20-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H9Cl, Quality Control of 1592-20-7.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics