Tag: M.W=150-200

Feofanov, Mikhail published the artcileSolid-state construction of zigzag periphery via intramolecular C-H insertion induced by alumina-mediated C-F activation, Application of 4-Chloro-2-methylphenylboronic acid, the publication is Chemical Communications (Cambridge, United Kingdom) (2021), 57(92), 12325-12328, database is CAplus and MEDLINE.

Here, the alumina-mediated C-F bond activation (AmCFA) enabled construction of PAHs with zigzag periphery was reported. This method includes formal Csp³-H activation and opens an avenue for generation of carbon-based nanomagnets directly on technol. relevant surfaces.

Chemical Communications (Cambridge, United Kingdom) published new progress about 209919-30-2. 209919-30-2 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Boronic Acids,Boronic acid and ester, name is 4-Chloro-2-methylphenylboronic acid, and the molecular formula is C7H8BClO2, Application of 4-Chloro-2-methylphenylboronic acid.

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

Tan, Derek S. published the artcileSynthesis and Preliminary Evaluation of a Library of Polycyclic Small Molecules for Use in Chemical Genetic Assays, Safety of 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride, the publication is Journal of the American Chemical Society (1999), 121(39), 9073-9087, database is CAplus.

(-)-Shikimic acid, was converted into both enantiomers of 2-hydroxyoxabicyclo[4.1.0]hept-3-ene-4-carboxylic acid which were attached to a solid support via a photocleavable linker. Tandem acylation-1,3-dipolar cycloaddition with nitrones yielded tetracyclic templates I. After development of several efficient coupling reactions of I and completion of extensive validation protocols, a split-pool synthesis yielded a binary encoded library calculated to contain 2.18 million polycyclic compounds These compounds are compatible with miniaturized cell-based forward chem. genetic assays designed to explore biol. pathways and reverse chem. genetic assays designed to explore protein function. As a simple illustration of the potential of these compounds, several were shown to activate a TGF-β-responsive reporter gene in mammalian cells.

Journal of the American Chemical Society 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 C12H15NO, Safety of 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride.

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

Brown, Louise M. published the artcileThe destruction of cytochrome P-450 by alclofenac: possible involvement of an epoxide metabolite, HPLC of Formula: 33697-81-3, the publication is Biochemical Pharmacology (1982), 31(2), 195-9, database is CAplus and MEDLINE.

In control mouse hepatic microsomes, no evidence for metabolism of alclofenac (I) [22131-79-9] was observed, but in induced (phenobarbitone or 3-methylcholanthrene) microsomes, I was metabolized to the dihydroxy [41451-01-8] and phenolic [33697-81-3] metabolites. Destruction of cytochrome P-450  [9035-51-2] was observed when I was incubated with microsomes from phenobarbitone-treated mice, but not untreated or 3-methylcholanthrene-treated mice; the destruction was dependent on the presence of a NADPH-regenerating system and was inhibited by SKF 525A, metyrapone, glutathione, and cysteine. The metabolites caused no loss of cytochrome P-450, whereas the reactive intermediate, alclofenac epoxide  [70319-10-7], was a potent inducer in the absence of NADPH. Thus, in vitro destruction of cytochrome P-450 by I is partly mediated through the formation of the reactive epoxy metabolite.

Biochemical Pharmacology published new progress about 33697-81-3. 33697-81-3 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene,Phenol, name is 3-Chloro-4-hydroxyphenylacetic acid, and the molecular formula is C8H7ClO3, HPLC of Formula: 33697-81-3.

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

Nesmeyanov, A. N. published the artcileThermal telomerization of olefins with silanes, Quality Control of 14799-94-1, the publication is Nesmeyanov, A. N., Izbrannye Trudy (1959), 688-95, database is CAplus.

cf. CA 51, 14541i; 52, 6165d. MeSiCl₂H (11.5 g.) was autoclaved with 4.3 g. ethylene in a glass ampul at 320-40° for 3 hrs. A 46% conversion was realized, with MeEtSiCl₂ and EtBuSiCl₂ comprising 80% and 17% of the product, resp. This was repeated in a steel 2.7-1. bomb with 1 mole MeSiCl₂H and 2.7 moles ethylene at 340° for 40 min. A 46% conversion was also realized with 42% MeEtSiCl₂ and 28% MeBuSiCl₂ (CA 51, 11988b). Ph₃SiH (32 g.), 30 ml. n-hexane, and 25 g. ethylene autoclaved 12 hrs. at 290-300° gave EtSiPh₃, m. 68-70°, BuSiPh₃, m. 81-2°, and (Ph₃Si)₂O, m. 221°. In a 0.5-1. steel autoclave was placed 65 g. MeSiCl₂H, 50 ml. propylene, and 0.1 ml. of a solution containing 0.00865 g. H₂PtCl₆.6H₂O in iso-PrOH. The mixture was warmed to room temperature, the reaction proceeding exothermally. After an hr., the mixture was removed and distilled to give 77 g. BuSiMeCl₂, b. 123-4°, n²⁰_D 1.4230, d₂₀ 1.0432, Raman spectra given. Propylene and MeSiCl₂H treated (CA 51, 11988b) and the MePrSiCl₂ isolated and methylated by the Grignard method gave Me₃SiPr, n²⁰_D 1.3925, d₂₀ 0.7020, Raman spectra given. Lines corresponding to Me₃SiPr-iso were not observed. C₆H₁₃SiMeCl₂ (from propylene and MeSiCl₂H) was also methylated with a Grignard to give C₆H₁₃SiMe₃, b₆₀ 82-3°, n²⁰_D 1.4171, d₂₀ 0.7493. A study was done with MeSiCl₂H and ethylene to determine optimum conditions for preparation of MeSiCl₂(C₂H₄)_nH, where n = 1, 2, 3, >3. A temperature of 300 ± 10° and 150 ± 5 atm. in an autoclave were best. Maximum yield, n = 1, when by moles C₂H₄/MeSiCl₂H = 0.75; n = 2, when C₂H₄/MeSi- Cl₂H = 1.5; n = 3, when C₂H₄/MeSiCl₂H = 2.8 and 3.4; n > 3 when C₂H₄/MeSiCl₂H = 9. The ratio C₂H₄/MeSiCl₂H was 2 and the pressure held at 100 atm. to give the maximum yield, n = 1, when temperature was raised to 400° and the mixture allowed to cool; n = 2, when the temperature = 320° for 10 min.; n = 3, when the temperature = 305° for 50 min.; n > 3, when the temperature = 285° for 120 min.

Nesmeyanov, A. N., Izbrannye Trudy published new progress about 14799-94-1. 14799-94-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(hexyl)(methyl)silane, and the molecular formula is C7H16Cl2Si, Quality Control of 14799-94-1.

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

Nesmeyanov, A. N. published the artcileThermal telomerization of silanes with olefins, Product Details of C7H16Cl2Si, the publication is Tetrahedron (1957), 248-52, database is CAplus.

Thermal telomerization of MeSiHCl₂ (I) with C₂H₄ at 260-75°/560 atm. was effected in a 500 cc. stainless steel autoclave. I (123 g.) in an N atm. was mixed with C₂H₄, the autoclave heated to 260°/500 atm., and the mixture maintained 2 hrs. at 260-70° with the pressure falling to 50 atm. The collected products (499 g.) from 3 runs (381 g. I) were fractionated to give 51 g. I and the tabulated pure MeSiCl₂(C₂H₄)_nH products (n, % yield, n²⁰_D, d₂₀, MR, b.p., given): 1, 23.6, -, -, -, 100°; 2, 25.6, 1.4312, 1.0427, 43.48, 147-8°; 3, 17.7, 1.4390, 0.9931, 52.75, 91°/32 mm.; 4, 13.4, 1.4440, 0.9761, 61.83, 94°/6 mm.; 5, 4.7, 1.4490, 0.9600, 71.32, 111-14°/3 mm.; 6, 3.8, 1.4532, 0.9552, 80.20, 124-7/3 mm.; above 6, 8.5, -, -, -, -. The reaction with SiCl₃H (II) was carried out 2 hrs. at 270-85° at maximum pressure 200 atm. in 4 runs (261 g. II) and yielded 353 g. product, distilled over a 15 plate column to give 10 g. II and pure alkyltrichlorosilanes, SiCl₃(C₂H₄)_nH (n, % yield, n²⁰_D, d₂₀, MR, and b.p. recorded): 1, 20.1, -, -, -, 98°; 2, 25.3, 1.4352, 1.1577, 43.19, 146-7°; 3, 15.4, 1.4440, 1.1094, 52.51, 87-9°/30; 4, 13.1, 1.4490, 1.0744, 61.76, 96.5°/10; 5, 4.0, 1.4547, 1.0501, 71.17, 76°/2; above 5, 12.2,-,-,- -. The structures of the methylalkyldichloro- and alkyltrichlorosilanes were substantiated by the MR determinations and by formation by the Grignard reaction of the corresponding trimethyl derivatives (compound, b.p., n²⁰_D, d₂₀, and MR given): BuSiMe₃, 114°, 1.4030, 0.7203, 44.12; C₆H₁₃SiMe₃, 163°, 1.4160, 0.7412, 53.58; C₈H₁₇SiMe₃, 75°/10 mm., 1.4242, 0.7646, 62.58. The reaction of I with C₃H₆ was carried out in 2 runs at 260-75° 3 hrs. at 100 atm. maximum pressure to give 216 g. product from 151 g. I. Distillation gave 21 g. I and MeSiCl₂(C₃H₆)_nH (n, n²⁰_D, and b.p./mm. given): 1, 1.4240, 123-4°; 2, 1.4400, 82°/32; 3, 1.4540, 80-2°/2. The telomerization reactions resulted from the cleavage of the Si-H bond, as evidenced by its absence in the compounds obtained as shown by the neg. test with KOH in H₂O. It is evident that the thermal reaction is of a chain character.

Tetrahedron published new progress about 14799-94-1. 14799-94-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(hexyl)(methyl)silane, and the molecular formula is C7H16Cl2Si, Product Details of C7H16Cl2Si.

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

Nesmeyanov, A. N. published the artcileThermal telomerization of methyldichlorosilane with olefins, Recommanded Product: Dichloro(hexyl)(methyl)silane, the publication is Doklady Akademii Nauk SSSR (1957), 271-2, database is CAplus.

Heating 123 g. MeSiHCl₂ 2 hrs. in a steel autoclave with C₂H₄ to 260° and a final pressure of 560 atm. gave 80% conversion to telomerization products MeSiCl₂(CH₂CH₂)_nH, with n = 1-6, as follows (n, % yield, b.p., n_D²⁰, and d₂₀ shown): 1, 23.6, b. 100°, -, -; 2, 25.6, b. 147-8°, 1.4312, 1.0427; 3, 17.7, b₃₂ 91°, 1.4390, 0.9931; 4, 13.4, b₆ 94° 1.4440, 0.9761; 5, 4.7, b₃ 111-14°, 1.4490, 0.9600; 6, 3.8, b₃ 124-7°, 1.4532, 0.9552. About 8.5% undescribed higher telomers were also formed. A similar reaction of MeSiHCl₂ and C₃H₆ was run 3 hrs. at 260-75° and 100 atm. maximum pressure yielded from 151 g. MeSiHCl₂, 216 g. products giving MeSiCl₂(C₃H₆)_nH (n shown) as follows: 1, 49, b. 123-4°, 1.4240, -; 2, 26.2, b₃₂ 82°, 1.4400, -; 3, 3.9, b₂ 80-2°, 1.4540, -; 10% undescribed higher telomers.

Doklady Akademii Nauk SSSR published new progress about 14799-94-1. 14799-94-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(hexyl)(methyl)silane, and the molecular formula is C7H16Cl2Si, Recommanded Product: Dichloro(hexyl)(methyl)silane.

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

McConnell, N. published the artcileMicrowave-assisted green synthesis of anilines, phenols, and benzenediamines without transition metals, ligands, or organic solvents, Category: chlorides-buliding-blocks, the publication is Green Chemistry Letters and Reviews (2018), 11(3), 286-295, database is CAplus and MEDLINE.

A novel, microwave-assisted method producing anilines I (R = H, 2-F, 2-Cl, etc.; EWG = 2-NO₂, 4-NO₂, 3-NO₂, etc.) and phenols II (R = H, 4-Br, 2-CF₃, etc.; EWG = 4-NO₂, 2-NO₂) from activated aryl halides is reported. This high-yielding method reduces current reaction requirements and removes organic solvents and catalysts making a more efficient and eco-friendly alternative for the synthesis of important pharmaceutical building blocks.

Green Chemistry Letters and Reviews published new progress about 350-30-1. 350-30-1 belongs to chlorides-buliding-blocks, auxiliary class Fluoride,Chloride,Nitro Compound,Benzene, name is 3-Chloro-4-fluoronitrobenzene, and the molecular formula is C6H3ClFNO2, Category: chlorides-buliding-blocks.

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

Elkamhawy, Ahmed published the artcileTargeting EGFR/HER2 tyrosine kinases with a new potent series of 6-substituted 4-anilinoquinazoline hybrids: Design, synthesis, kinase assay, cell-based assay, and molecular docking, Name: 3-Chloro-4-fluoronitrobenzene, the publication is Bioorganic & Medicinal Chemistry Letters (2015), 25(22), 5147-5154, database is CAplus and MEDLINE.

Coexpression of EGFR and HER2 has been found in many tumors such as breast, ovarian, colon and prostate cancers, with poor prognosis of the patients. Herein, our team has designed and synthesized new eighteen compounds with 6-substituted 4-anilinoquinazoline core to selectively inhibit EGFR/HER2 tyrosine kinases. Twelve compounds showed nanomolar range of IC₅₀ values on EGFR and/or HER2 kinases. Accordingly, a detailed structure activity relationship (SAR) was established. A mol. docking study demonstrated the favorable binding modes of I (X = Me, NHEt) at the ATP active site of both kinases. A kinase selectivity profile performed for compound 8d showed great selectivity for EGFR and HER2. In addition, compound I (X = Me, NHEt) and II exerted selective promising cytotoxic activity over BT-474 cell line with IC₅₀ values of 2.70, 1.82 and 1.95 μM, resp. From these results, we report analogs I (X = Me, NHEt) and II as promising candidates for the discovery of well-balanced compounds in terms of the kinase inhibitory potency and antiproliferative activity.

Bioorganic & Medicinal Chemistry Letters published new progress about 350-30-1. 350-30-1 belongs to chlorides-buliding-blocks, auxiliary class Fluoride,Chloride,Nitro Compound,Benzene, name is 3-Chloro-4-fluoronitrobenzene, and the molecular formula is C6H3ClFNO2, Name: 3-Chloro-4-fluoronitrobenzene.

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

Saeidian, Hamid published the artcileHarmony of computational quantum chemistry and experimental chemistry: Comprehensive DFT studies, microsynthesis, and characterization of mustard gas polysulfide analogues, COA of Formula: C4H8Cl2S2, the publication is Journal of Molecular Structure (2018), 57-62, database is CAplus.

After microsynthesis, structures of mustard gas polysulfide analogs were characterized using electron impact (EI) mass spectrometry. General EI fragmentation pathways for such compounds are proposed. The structure of sulfur mustard (HD) and its two other polysulfide analogs have been examined through B3LYP/6-311++G(2d, 2p) calculations Geometrical anal. of HD shows that the calculated bond distances are satisfactorily comparable with exptl. results. Calculated NMR chem. shifts for HD also were compared with exptl. data, indicating good agreement both for ¹H and ¹³C atoms. The vibrational frequencies of HD and polysulfide analogs have been precisely assigned. At the end, based on visual inspection of lowest unoccupied MOs and the relative difference in the total energies of their episulfonium ions, relative reactivity of HD and its polysulfide analogs were investigated.

Journal of Molecular Structure published new progress about 1002-41-1. 1002-41-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 1,2-Bis(2-chloroethyl)disulfane, and the molecular formula is C4H8Cl2S2, COA of Formula: C4H8Cl2S2.

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

Vega Erramuspe, Iris Beatriz published the artcileAdvanced Cellulose Fibers for Efficient Immobilization of Enzymes, Synthetic Route of 6249-56-5, the publication is Biomacromolecules (2016), 17(10), 3188-3197, database is CAplus and MEDLINE.

Biocatalytic pulp fibers were prepared using surface functionalization of bleached kraft pulp with amino groups (F) and further immobilization of a crosslinked glucose oxidase (G^*) from Aspergillus niger. The crosslinked enzymes (G^*) were characterized using x-ray spectroscopy, FTIR spectroscopy, dynamic scanning calorimetry and dynamic light scattering. According to standard assays, the G^* content on the resulting fibers (FG^*) was 11 mg/g of fiber, and the enzyme activity was 215 U/g. The results from confocal- and stimulated emission depletion microscopic techniques demonstrated that G^* did not penetrate the interlayers of fibers. The benefit of pulp fiber functionalization was evident in the present case, as the introduction of amino groups allowed the immobilization of a larger amount of enzymes and rendered more efficient systems. Using the approach described here, several advanced materials from wood pulp fibers and new bioprocesses might be developed by selecting the correct enzyme for the target applications.

Biomacromolecules 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 C14H21BO3, Synthetic Route of 6249-56-5.

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