Month: December 2022

Shinohara, Naoki published the artcileSelective Modification of the N-Terminal Structure of Polytheonamide B Significantly Changes its Cytotoxicity and Activity as an Ion Channel, Safety of 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride, the publication is ChemMedChem (2012), 7(10), 1770-1773, S1770/1-S1770/7, database is CAplus and MEDLINE.

Polytheonamide B is an extremely cytotoxic natural product and is the largest nonribosomal peptide that has been described to date. Polytheonamide B is a linear chain polypeptide containing an N-terminal 5,5-dimethyl-2-oxohexanoate group (Ncap) and 48 amino acid residues of alternating D– and L-chirality; in addition, the secondary structure of this peptide was recently reported to be a remarkable β^6,3 helix with a length of approx. 45 Å. This helical tube structure is thought to function as a transmembrane ion channel in which the 4 Å hydrophobic pore provides a path for ion translocation. Planar bilayer experiments have previously demonstrated that the monomeric form of polytheonamide B functions as a monovalent cation-selective channel. The present work describes the synthesis of seven derivatives of polytheonamide B and examines the effect of N-terminal modification on cytotoxicity and ion channel activity.

ChemMedChem published new progress about 6249-56-5. 6249-56-5 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst,Inhibitor,Natural product, name is 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride, and the molecular formula is C20H17FO4S, Safety of 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Yoshii, Yoshihiro published the artcileFriedel-Crafts phenylsulfonylation of o-xylene, indan, and tetralin in nitrobenzene, Computed Properties of 61551-49-3, the publication is Nippon Kagaku Kaishi (1986), 1117-21, database is CAplus.

Friedel-Crafts reactions of o-xylene, indan, and tetralin with PhSO₂Cl in the presence of AlCl₃ in PhNO₂ were studied in relation to temperature effects on isomer distribution under kinetic conditions. In indan, the isomer ratio (3 to 4) increased with temperature, while the ratio (3 to 4) decreased in o-xylene and in tetralin. Differences of activation energies and activation entropies in the 3- and 4-position for o-xylene, indan, and tetralin were -0.39 kcal/mol, -2.0 e.u./mol; 0.16, -0.2; and -0.31, -1.5. Isokinetic temperature were -81 and -62° for o-xylene and tetralin, resp. These results suggest that the 3-position of o-xylene or tetralin is more reactive than the 4-position, whereas the 4-position is more reactive in indan. The reaction proceeded with a concerted mechanism in which strong acid-catalytic effect by AlCl₃ and base-catalyzed deprotonation by solvent and/or AlCl₄^– on the 3-position were observed in o-xylene and tetralin.

Nippon Kagaku Kaishi published new progress about 61551-49-3. 61551-49-3 belongs to chlorides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 5,6,7,8-Tetrahydronaphthalene-2-sulfonyl chloride, and the molecular formula is C25H23NO4, Computed Properties of 61551-49-3.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Zeid, I. F. published the artcileReactions with coumarin. VII, Safety of Coumarin-6-sulfonyl chloride, the publication is Afinidad (2003), 60(504), 215-219, database is CAplus.

Coumarin-6-sulfonamides I (n = 1, X = NH; n = 2, X = O, S) were synthesized by reactions of coumarin-6-sulfonyl chloride with semicarbazide, thiosemicarbazide and guanidine, resp.. The subsequent treatment of I with di-Et malonate, acetylacetone, and Et acetoacetate gave the corresponding pyrimidine derivatives, e.g. II (X = O, S) from the reaction with di-Et malonate.

Afinidad published new progress about 10543-42-7. 10543-42-7 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Chloride,Sulfonyl chlorides,Ester, name is Coumarin-6-sulfonyl chloride, and the molecular formula is C8H11BO2, Safety of Coumarin-6-sulfonyl chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Zeid, I. F. published the artcileReactions with coumarin. VIII, Formula: C9H5ClO4S, the publication is Afinidad (2003), 60(505), 295-299, database is CAplus.

A series of thiadiazole and selenadiazole derivatives was synthesized via oxidative cyclization of some semicarbazone derivatives of the types I. The later compounds were formed via reaction of coumarin-6-sulfonyl chloride 1 with m-, p-aminoacetophenone and/or o- and p-hydroxyacetophenone to give coumarin-6-sulfonamides II or the esters. Condensation of II and the esters with semicarbazide hydrochloride afforded the semicarbazones of type I. Oxidative cyclization of I with thionyl chloride led to the formation of the thiadiazole derivatives III. On the other hand, oxidative cyclization of I with selenium dioxide led to the formation of the corresponding selenadiazole derivatives

Afinidad published new progress about 10543-42-7. 10543-42-7 belongs to chlorides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Chloride,Sulfonyl chlorides,Ester, name is Coumarin-6-sulfonyl chloride, and the molecular formula is C3H5BN2O2, Formula: C9H5ClO4S.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Davidson, R. Stephen published the artcileThe efficiency of reaction between reactive fluorescent whitening agents and wool, Application In Synthesis of 18791-02-1, the publication is Journal of the Society of Dyers and Colourists (1988), 104(2), 86-93, database is CAplus.

Three potential fluorescent whitening agents (I; R = A, COCH₂Cl, or COCBr:CH₂) containing halogen atoms which intramol. quench fluorescence were prepared and applied to wool serge by 4 different methods to evaluate the effect of method of application on the extent to which bonds are established. The particular pad-batch method of application exerted considerable influence on the extent of covalent reaction between the wool and reactive fluorescent whitener. Complete displacement of all halogen atoms by nucleophilic groups in wool did not occur when the fluorescent whiteners were applied by cold pad-batch methods. Treatment with morpholine, Na₂CO₃, or water was necessary to develop the full potential fluorescence yield of whitener on the fabric. No fluorescence was observed when com. fluorescent whiteners, e.g., Photine HV and Blankophor BA, were applied to brominated wool, confirming that the presence of halogen atoms leads to fluorescence quenching via the heavy atom effect. The fluorescence of the whiteners was restored when the brominated fabrics were subjected to a reduction treatment. Application of the whiteners by exhaustion, with thiourea present in the liquor, at high temperatures always produced strongly fluorescent fabrics, implying that the halogen atoms were completely displaced using this application method. It is not yet possible to state whether reactions leading to covalent bonds with the fiber or hydrolysis are occurring.

Journal of the Society of Dyers and Colourists published new progress about 18791-02-1. 18791-02-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 2,3-Dibromopropionylchloride, and the molecular formula is C3H3Br2ClO, Application In Synthesis of 18791-02-1.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Tanaka, Yusuke published the artcileA new entry for the oxidation of fluoroalkyl-substituted methanol derivatives: Scope and limitation of the organoiodine(V) reagent-catalyzed oxidation, Related Products of chlorides-buliding-blocks, the publication is Journal of Fluorine Chemistry (2012), 99-104, database is CAplus.

Oxidation of various fluoroalkyl-substituted methanol derivatives under the influence of a catalytic amount of sodium 2-iodobenzenesulfonate and oxone in CH₃CN or CH₃NO₂ was investigated in detail. The efficiency of the newly developed oxidation was also evaluated by comparison to other oxidations, such as Dess-Martin, PDC, and Swern oxidation

Journal of Fluorine Chemistry published new progress about 5860-95-7. 5860-95-7 belongs to chlorides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Chloride,Benzene,Ketone, name is 1-(2-Chlorophenyl)-2,2,2-trifluoroethanone, and the molecular formula is C8H6ClN, Related Products of chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Tamao, Kohei published the artcileSilafunctional compounds in organic synthesis. XXVI. Silyl groups synthetically equivalent to the hydroxy group, Recommanded Product: Dichloro(methyl)(octyl)silane, the publication is Journal of Organometallic Chemistry (1984), 269(3), C37-C39, database is CAplus.

Oxidative cleavage of Me(CH₂)₇SiMe₂R [R = H, F, Cl, NEt₂, alkyl, Me, OSiMe₂(CH₂)₇Me] and Me(CH₂)₇Si(OEt)₃ with 30% H₂O₂ and MHCO₃ (M = K, Na) gave 70-100% Me(CH₂)₇OH.

Journal of Organometallic Chemistry published new progress about 14799-93-0. 14799-93-0 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(methyl)(octyl)silane, and the molecular formula is C22H12F6O6S2, Recommanded Product: Dichloro(methyl)(octyl)silane.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Watanabe, Hitoshi published the artcileIdentification of 2-fluoro-8-methyl-11-(1-methyl-1,2,3,6-tetrahydropyridin-4-yl)-5H-dibenzo[b,e][1,4]diazepine with clozapine-like mixed activities at muscarinic acetylcholine, dopamine, and serotonin receptors, Category: chlorides-buliding-blocks, the publication is Bioorganic & Medicinal Chemistry Letters (2021), 127911, database is CAplus and MEDLINE.

Identification of 2-fluoro-8-methyl-11-(1-methyl-1,2,3,6-tetrahydropyridin-4-yl)-5H-dibenzo[b,e][1,4]diazepine with clozapine-like mixed activities at muscarinic acetylcholine, dopamine, and serotonin receptors. We hypothesized that brain penetration of NDMC differed from individual to individual, and highly permeable individuals may be responders, leading to M1 agonism. In order to demonstrate the Clozapine M1-hypothesis, we considered the following profile to be required: (i) robust M1 agonism, (ii) clozapine-like binding affinity toward various GPCRs, (iii) diminish or reduce reactive metabolite for-mation, (iv) no or weak M3 agonism, and (v) high brain permeability.

Bioorganic & Medicinal Chemistry Letters published new progress about 60091-87-4. 60091-87-4 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Nitro Compound,Carboxylic acid,Amine,Benzene, name is 2-((4-Chloro-2-nitrophenyl)amino)benzoic acid, and the molecular formula is C9H4F6O, Category: chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Watanabe, Hitoshi published the artcileSynthesis and pharmacological evaluation of 11-(1,6-dimethyl-1,2,3,6-tetrahydropyridin-4-yl)-5H-dibenzo[b,e][1,4]diazepines with clozapine-like receptor occupancy at dopamine D₁/D₂ receptor, Category: chlorides-buliding-blocks, the publication is Bioorganic & Medicinal Chemistry Letters (2020), 30(21), 127563, database is CAplus and MEDLINE.

Clozapine-like compound without agranulocytosis risk is need to cure the treatment resistant schizophrenia (TRS). We discovered I as Clozapine-like dopamine D₂/D₁ receptor selectivity and improved reactive metabolites formation profile by the modification of piperazine moiety in Clozapine. The optimization of I gave compound II to be best compound (approx. 10-fold stronger affinity for D₂/D₁ receptor and similar D₂/D₁ selectivity ratio with Clozapine). Clozapine-like D₂/D₁ receptor occupancy profile was proved by in vivo evaluation. In addition, the reactive metabolites derived agranulocytosis risk of compound II was considered to be lower than Clozapine. The pharmacol. detail of compound II is being investigated to develop it for TRS treatment.

Bioorganic & Medicinal Chemistry Letters published new progress about 60091-87-4. 60091-87-4 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Nitro Compound,Carboxylic acid,Amine,Benzene, name is 2-((4-Chloro-2-nitrophenyl)amino)benzoic acid, and the molecular formula is C9H10O4, Category: chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Kobayashi, Masahiro published the artcileO-glycosylation of 4-(substituted benzyl)-1,2-dihydro-3H-pyrazol-3-one derivatives with 2,3,4,6-tetra-O-acyl-α-D-glucopyranosyl bromide via N¹-acetylation of the pyrazole ring, Synthetic Route of 23616-79-7, the publication is Chemical & Pharmaceutical Bulletin (2016), 64(7), 1009-1018, database is CAplus and MEDLINE.

A practical preparation of 4-(substituted benzyl)-3-(2,3,4,6-tetra-O-acyl-β-D-glucopyranosyloxy)-1H-pyrazole derivative is described. O-Glycosylation of 4-(substituted benzyl)-1,2-dihydro-3H-pyrazol-3-one derivative was facilitated by introduction of electron-withdrawing substituents, such as an acetyl group, at the N1-position of the pyrazole ring. 1-Acetyl-4-(substituted benzyl)-1,2-dihydro-3H-pyrazol-3-one reacted with 2,3,4,6-tetra-O-acyl-α-D-glucopyranosyl bromide in the presence of potassium carbonate in acetonitrile to provide the 1-acetyl-4-(substituted benzyl)-3-(2,3,4,6-tetra-O-acyl-β-D-glucopyranosyloxy)-1H-pyrazole derivative in high yield. The synthetic intermediate of Remogliflozin etabonate was synthesized using this strategy.

Chemical & Pharmaceutical Bulletin published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Synthetic Route of 23616-79-7.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics