Month: November 2022

Simon, Cedric published the artcileMild Niobium-Catalyzed [2 + 2 + 2] Cycloaddition of Sila-triynes: Easy Access to Polysubstituted Benzosilacyclobutenes, Synthetic Route of 14799-94-1, the publication is Organic Letters (2015), 17(4), 844-847, database is CAplus and MEDLINE.

A new and efficient synthesis of highly sensitive benzosilacyclobutenes has been developed. For the first time, these compounds can be synthesized in very high yields by a mild, unprecedented intramol. niobium-catalyzed [2 + 2 + 2] cycloaddition of easily accessible tetrasubstituted sila-triynes. An easy access to highly functionalized benzosilacyclobutenes enlarging the number of potential applications in organic and material chem. is described.

Organic Letters 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 C9H4F6O, Synthetic Route of 14799-94-1.

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

Ando, Ryoichi published the artcileDesign, synthesis, and evaluation of novel kazusamycin A derivatives as potent antitumor agents, Product Details of C5H10Cl3O3P, the publication is Bioorganic & Medicinal Chemistry Letters (2006), 16(12), 3315-3318, database is CAplus and MEDLINE.

Novel kazusamycin A derivatives I (R = R¹ = Me, R² = H; R = R² = Me, R¹ = H; R = R¹ = H, R² = Me; R = R¹ = R² = Me) were designed in the viewpoint of decrease of reactivity at the α,β-unsaturated δ-lactone moiety against Michael-type addition Although 25-30 steps were required for the synthesis of each compound, their syntheses were achieved. Cytotoxicity against HPAC cell line was evaluated, and two of them, I (R = R¹ = Me, R² = H; R = R¹ = H, R² = Me), exhibited comparable potency to kazusamycin A. Hepatic toxicity of these designed compounds was much lower than that of kazusamycin A.

Bioorganic & Medicinal Chemistry Letters published new progress about 866-23-9. 866-23-9 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyltrichloromethylphosphonate, and the molecular formula is C5H10Cl3O3P, Product Details of C5H10Cl3O3P.

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

Mizukawa, Yumiko published the artcileExtraction of peroxisome proliferator-activated receptor α agonist-induced lipid metabolism-related and unrelated genes in rat liver and analysis of their genomic location, Quality Control of 637-07-0, the publication is Journal of Toxicological Sciences (2020), 45(8), 449-473, database is CAplus.

Although peroxisome proliferator-activated receptor α (PPARα) agonists are obviously hepatocarcinogenic in rodents, they have been widely used for dyslipidemia and proven to be safe for clin. use without respect to the species difference. It is established that PPARα acts as a part of the transcription factor complex, but its precise mechanism is still unknown. Using the data of Toxicogenomics Database, reliable genes responsive to PPARα agonists, clofibrate, fenofibrate and WY-14,643, in rat liver, were extracted from both in vivo and in vitro data, and sorted by their fold increase. It was found that there were many genes responding to fibrates exclusively in vivo. Most of the in vivo specific genes appear to be unrelated to lipid metabolism and are not upregulated in the kidney. Anal. of PPAR-responsive elements could not explain the observed difference in induction. To evaluate possible interaction between neighboring genes in gene expression, the correlation of the fold changes of neighboring genes for 22 drugs with various PPARα agonistic potencies were calculated for the genes showing more than 2.5 fold induction by 3 fibrates in vivo, and their genomic location was compared with that of the human orthologue. In the present study, many candidates of genes other than lipid metabolism were selected, and these could be good starting points to elucidate the mechanism of PPARα agonist-induced rodent-specific toxicity.

Journal of Toxicological Sciences published new progress about 637-07-0. 637-07-0 belongs to chlorides-buliding-blocks, auxiliary class Inhibitor,Cell Cycle,PPAR, name is Ethyl 2-(4-chlorophenoxy)-2-methylpropanoate, and the molecular formula is C12H15ClO3, Quality Control of 637-07-0.

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

El-Maghraby, A. A. published the artcileSynthesis of coumarin sulfonamides, sulfonates, and related compounds, Related Products of chlorides-buliding-blocks, the publication is Egyptian Journal of Chemistry (1985), 27(4), 459-69, database is CAplus.

Condensation of coumarin-6-sulfonyl chloride I (R = SO₂Cl) with H₂NCH₂CH₂NH₂ gave sulfonamide I [R = SO₂NH(CH₂)₂NH₂], which reacted with aromatic amines to give the corresponding Schiff bases I [R = SO₂NH(CH₂)₂N:CHR¹ (R¹ = Ph, substituted Ph)]. Various coumarin-3,6-disulfonamides II [R = SO₂NHR¹ (R¹ = Ph, substituted Ph)], diarylsulfonates II [R = SO₃R¹ (R¹ = substituted Ph)], and coumarin-6-sulfonamides I [R = SO₂NHR¹ (R¹ = Bu, CH₂Ph, 2-furyl, piperidyl)] were prepared starting from coumarin-3,6-disulfonyl chloride (II, R = SO₂Cl).

Egyptian Journal of Chemistry 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 C9H5ClO4S, Related Products of chlorides-buliding-blocks.

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

Bedair, A. H. published the artcileBiologically active sulfonamides derived from α-pyrones, Formula: C9H5ClO4S, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (1987), 26B(1), 91-4, database is CAplus.

Amidation of 3-carbethoxycoumarin (I) and p-H₂NC₆H₄SO₂NHR [e.g., R = H, o-, m-, and p-tolyl, CH₂Ph, C(NH₂):NH] gave R¹CONHC₆H₄SO₂NHR-p (II) (same R; R¹ = coumarin-3-yl). Treatment of I with p-H₂NNHSO₂C₆H₄NHAc gave R¹CONHNHSO₂C₆H₄R² III (same R¹; R² = NHAc-p), which was converted to III (R² = N:CHPh-p) with PhCHO after hydrolysis. Substitution reaction of 6-coumarinsulfonyl chloride (= R³SO₂Cl) with p– or o-HOC₆H₄CHO gave R³SO₃C₆H₄CHO-p (IV) or –o, resp. IV was converted to Schiff bases V (R⁴ = o-NO₂, p-Me) with R⁴C₆H₄NH₂ (same R⁴). Similar reactions occurred starting with 3-carbethoxy-5,6-benzocoumarin. II (R = H, o-tolyl), IV, and V showed bactericidal activity.

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry 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 C9H5ClO4S, Formula: C9H5ClO4S.

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

Peters, Rene published the artcilePractical Formal Total Syntheses of the Homocamptothecin Derivative and Anticancer Agent Diflomotecan via Asymmetric Acetate Aldol Additions to Pyridine Ketone Substrates, Application of 2-Chloroisonicotinic acid, the publication is Journal of Organic Chemistry (2006), 71(20), 7583-7595, database is CAplus and MEDLINE.

Two practical, efficient, and scalable asym. routes to DE ring fragment I, a key building block in the synthesis of the homocamptothecin derivative diflomotecan (II), are described. The “acetal route” starts from 2-chloro-4-cyanopyridine and represents an enantioselective and optimized modification of the original racemic discovery chem. synthesis. The inefficient optical resolution procedure was replaced by an efficient asym. acetate aldol addition (dr 87:13) to a ketone substrate as the key step generating the (R)-configured quaternary stereocenter with high stereoselectivity. I was finally obtained in 8.9% overall yield (er 99.95:0.05) over nine steps, avoiding chromatog. purifications and comparing favorably with the initial procedure. In the related “amide route” starting from 2-chloroisonicotinic acid, a secondary amide directing group was used to facilitate the ortho lithiation of the pyridine 3-position. The key step of this protocol again consists of a practical asym. acetate aldol addition (dr = 87:13). The DE ring building block I was thus obtained in 11.1% overall yield (er > 99.95:0.05) over nine steps requiring only one chromatog. purification

Journal of Organic Chemistry published new progress about 6313-54-8. 6313-54-8 belongs to chlorides-buliding-blocks, auxiliary class Pyridine,Chloride,Carboxylic acid, name is 2-Chloroisonicotinic acid, and the molecular formula is C6H4ClNO2, Application of 2-Chloroisonicotinic acid.

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

Doetterl, Matthias published the artcileNickel-Catalyzed Propene Dimerization Reactions in Triphenylbismuth-Buffered Chloroaluminate Ionic Liquids: High Performance with Unconventional Cations, Category: chlorides-buliding-blocks, the publication is Advanced Synthesis & Catalysis (2012), 354(2-3), 399-407, database is CAplus.

The addition of triphenylbismuth (BiPh₃) efficiently buffers Lewis acidic chloroaluminate ionic liquids over a wide range of compositions Since the m.ps. of these ternary mixtures are lower compared to unbuffered chloroaluminate systems, the scope of cations for the formation of buffered room temperature ionic liquids is greatly extended. The buffered ionic liquids were used to activate nickel complexes for selective biphasic propene dimerization reactions. Lifetimes, selectivities and productivities of such dimerization catalysts could be adjusted by the choice of the cation and the composition At lower reaction temperatures, the selectivities to give dimers increased significantly. Propene dimers were obtained with selectivities of up to 98%. A cation screening with 100 ammonium and phosphonium halide salts was performed. N-Methylpyrrolidine hydrochloride gave the best results in terms of selectivity and lifetime. Propene dimerization reactions in BiPh₃-buffered chloroaluminate melts were catalyzed by various soluble nickel compounds with similar performances. The introduction of basic, sterically demanding tricyclohexylphosphine ligands led to higher degrees of branching, however, at the expense of lower dimer selectivities.

Advanced Synthesis & Catalysis 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, Category: chlorides-buliding-blocks.

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

Lowen, Gregory T. published the artcileA Novel Synthesis of Phosphonates from Diethyl (Trichloromethyl)phosphonate, Application In Synthesis of 866-23-9, the publication is Journal of Organic Chemistry (1994), 59(16), 4548-50, database is CAplus.

Com. available di-Et (trichloromethyl)phosphonate was reacted with aldehydes and ketones to generate (chlorovinyl)phosphonates, e.g., PhCH:CClPO(OEt)₂, in a single step. These intermediates could be hydrogenated in high yields to the corresponding saturated phosphonates..

Journal of Organic Chemistry published new progress about 866-23-9. 866-23-9 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyltrichloromethylphosphonate, and the molecular formula is C5H10Cl3O3P, Application In Synthesis of 866-23-9.

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

Wang, Yujia published the artcileChiral Atropisomeric Indenocorannulene Bowls: Critique of the Cahn-Ingold-Prelog Conception of Molecular Chirality, COA of Formula: C7H8BClO2, the publication is Angewandte Chemie, International Edition (2018), 57(22), 6470-6474, database is CAplus and MEDLINE.

Chiral corannulenes abound, but suffer generally from configurational lability associated with bowl-to-bowl inversion, thus obviating questions of stereogenicity and stereoelement construction. In contrast, peri-annulated corannulenes show greatly increased barriers for bowl-to-bowl inversion; specifically indenocorannulenes invert on a time scale too slow to observe by normal NMR methods and raise the possibility of creating chiral atropisomeric bowl-shaped aromatics Two methods for preparing indenocorannulene from simple 2-haloarylcorannulenes-silyl cation C-F activation, and Pd-mediated C-Cl activation^[5]-enable the synthesis of an array of such chiral atropisomeric indenocorannulenes. Resolution of the enantiomers by high-performance liquid chromatog. over chiral support phases motivates the study of chiroptical properties, the assignment of absolute “Cartesian” configuration, and the assessment of configurational stability. These studies bring into question any systematic assignment of nontrivial stereoelements (i.e. not the mol. in its entirety) and refute any assertion of congruence between “Cahn-Ingold-Prelog elements” and the phys. or “Cartesian” basis of chirality.

Angewandte Chemie, International Edition published new progress about 145349-62-8. 145349-62-8 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Boronic Acids, name is 2-Chloro-4-methylphenylboronic acid, and the molecular formula is C11H14O2, COA of Formula: C7H8BClO2.

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

Suliman, Fakhr Eldin O. published the artcileAnalysis of phenols in water by high-performance liquid chromatography using coumarin-6-sulfonyl chloride as a fluorogenic precolumn label, Recommanded Product: Coumarin-6-sulfonyl chloride, the publication is Journal of Chromatography A (2006), 1101(1-2), 179-184, database is CAplus and MEDLINE.

A simple, sensitive and rapid reversed-phase HPLC (RP-HPLC) method is proposed for the anal. of some environmentally important phenols in H₂O. The use of coumarin-6-sulfonyl chloride (C6SCl) as a fluorescence-labeling reagent was studied. The compound reacts with phenols within 20 min under mild conditions (ambient temperature, pH 9.0) to give sulfonates that can be separated by RP-HPLC employing fluorescence detection at λ _ex = 360 and λ _em = 460 nm. The optimum conditions for fluorescence, derivatization and chromatog. separation were established and detection limits in the range 0.1-0.9 μg L^-1 were obtained for the studied compounds The calibration curves were linear for the range 6-200 μg L^-1 for phenol, 3-200 μg L^-1 for 2-chlorophenol, 4-chlorophenol and 2,3,5-trichlorophenol and for the range of 3-100 μg L^-1 for 2,3-dichlorophenol and 3,5-dichlorophenol. The practical applicability of the method to environmental samples was demonstrated by analyzing drinking and industrial H₂O samples spiked with the phenolic compounds

Journal of Chromatography A 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 C10H7IN2, Recommanded Product: Coumarin-6-sulfonyl chloride.

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