Catalysis-chemistry

Wu, Gongde published the artcileOne-step synthesis of 2,4-disubstituted thiazoles in Au(I) complex/zinc salt catalytic system, HPLC of Formula: 1237588-12-3, the publication is Youji Huaxue (2015), 35(12), 2537-2544, database is CAplus.

Ten typical P,N-bidentate ligands were selected to synthesize the corresponding Au(I) complexes. The catalytic system of Au(I) complex/metal salt was employed in the catalytic oxidation of terminal alkynes with the oxidant of 8-methylquinoline N-oxide. And then 2,4-disubstituted thiazoles were synthesized from the oxidized alkynes and thioamides. It was found that the catalytic system of 5 mol% Mor-DalPhosAuCl/10 mol% Zn(NTf₂)₂ showed the optimum catalytic performance in this reaction via adjusting reaction parameters. Furthermore, ten kinds of 2,4-disubstituted thiazoles were effectively synthesized in one-step. So a simple and direct synthetic route was explored for the preparation of thiazoles and their derivatives

Youji Huaxue published new progress about 1237588-12-3. 1237588-12-3 belongs to catalysis-chemistry, auxiliary class Mono-phosphine Ligands, name is 4-(2-(Di(adamantan-1-yl)phosphino)phenyl)morpholine, and the molecular formula is C8H10O2, HPLC of Formula: 1237588-12-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wu, Gongde published the artcileHighly efficient one-pot synthesis of 2,4-disubstituted thiazoles using Au(I) catalyzed oxidation system at room temperature, Formula: C30H42NOP, the publication is Catalysts (2016), 6(8), 126/1-126/9, database is CAplus.

A gold complex catalysts with Mor-DalPhos ligands were successfully prepared using mesylates as counter ions. Seven ammonium sulfonates were synthesized to promote the production of intermediate sulfonyloxymethyl ketone. It was found that low-acidity N,N-dimethylbenzenaminium methanesulfonate showed excellent activity in the reaction. Furthermore, the catalysts effectively avoided the loss of activity due to the low acidity. Various thioamides were directly added to the resulting reaction mixture without the separation of intermediate product. Then, twenty kinds of 2,4-disubstituted thiazoles were efficiently synthesized at room temperature with the highest yield of 91%. An efficiency and mild gold-catalyzed oxidation system for the one-pot synthesis of thiazole and its derivatives was provided.

Catalysts published new progress about 1237588-12-3. 1237588-12-3 belongs to catalysis-chemistry, auxiliary class Mono-phosphine Ligands, name is 4-(2-(Di(adamantan-1-yl)phosphino)phenyl)morpholine, and the molecular formula is C10H18O, Formula: C30H42NOP.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Dong, Jianyang published the artcileFormyl-selective deuteration of aldehydes with D₂O via synergistic organic and photoredox catalysis, Recommanded Product: 2,4,6-Triisopropylbenzenethiol, the publication is Chemical Science (2020), 11(4), 1026-1031, database is CAplus and MEDLINE.

A mild general method for formyl-selective deuterium labeling of aldehydes with D₂O, an inexpensive deuterium source, via a synergistic combination of light-driven, polyoxometalate-facilitated hydrogen atom transfer and thiol catalysis was reported. This highly efficient, scalable reaction showed excellent deuterium incorporation, a broad substrate scope and excellent functional group tolerance and selectivity and was therefore a practical method for late-stage modification of synthetic intermediates in medicinal chem. and for generating libraries of deuterated compounds

Chemical Science published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Recommanded Product: 2,4,6-Triisopropylbenzenethiol.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Reja, Rahi M. published the artcileLysine-Targeting Reversible Covalent Inhibitors with Long Residence Time, Related Products of catalysis-chemistry, the publication is Journal of the American Chemical Society (2022), 144(3), 1152-1157, database is CAplus and MEDLINE.

We report a new reversible lysine conjugation that features a novel diazaborine product and much slowed dissociation kinetics in comparison to the previously known iminoboronate chem. Incorporating the diazaborine-forming warhead RMR1 to a peptide ligand gives potent and long-acting reversible covalent inhibitors of the staphylococcal sortase. The efficacy of sortase inhibition is demonstrated via biochem. and cell-based assays. A comparative study of RMR1 and an iminoboronate-forming warhead highlights the significance and potential of modulating bond dissociation kinetics in achieving long-acting reversible covalent inhibitors.

Journal of the American Chemical Society published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hahn, Dongyup published the artcileDetermination of sequence and absolute configuration of peptide amino acids by HPLC-MS/CD-based detection of liberated N-terminus phenylthiohydantoin amino acids, Recommanded Product: (S)-2-Amino-4-(methylthio)butanoic acid, the publication is Scientific Reports (2022), 12(1), 10285, database is CAplus and MEDLINE.

We report a method for the simultaneous determination of the sequence and absolute configuration of peptide amino acids using a combination of Edman degradation and HPLC-MS/CD. Phenylthiohydantoin (PTH) derivatives of 20 pairs of standard D- and L-amino acids were synthesized by the Edman reaction. The CD spectra of the derivatives revealed that each pair of the PTH derivatives exhibited the absorption with opposite signs at around 270 nm. These standard PTH derivatives showed well-resolved resolution without interference from byproducts in the ion chromatogram and clear pos./neg. CD absorptions when subjected on a reversed phase HPLC-MS system coupled with a CD-2095 HPLC detector. This method was applied for the detection of a synthetic pentapeptide and a natural depsipeptide (halicylindramide C). The sequence and configuration of the pentapeptide and up to eight residues of halicylindramide C were successfully analyzed by this method. The amino acid configuration of the pentapeptide was also determined successfully by subjecting its acid hydrolyzates to the Edman reaction followed by HPLC-MS/CD.

Scientific Reports published new progress about 63-68-3. 63-68-3 belongs to catalysis-chemistry, auxiliary class Natural product, name is (S)-2-Amino-4-(methylthio)butanoic acid, and the molecular formula is C5H11NO2S, Recommanded Product: (S)-2-Amino-4-(methylthio)butanoic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wang, Tao published the artcileSynthesis and Biological Activity of 1-(Substituted phenoxyacetoxy)-1-(pyridin-2-yl or thien-2-yl)methylphosphonates, Recommanded Product: 2-(4-(Trifluoromethyl)phenoxy)acetic acid, the publication is Journal of Heterocyclic Chemistry (2015), 52(1), 173-179, database is CAplus.

A series of novel O,O-di-Me 1-(substituted phenoxyacetoxy)-1-(pyridin-2-yl/thien-2-yl)methylphosphonates were synthesized. Structures were confirmed by IR, ¹H NMR, mass spectroscopy, and elemental analyses. The results of preliminary bioassays show that some of the title compounds exhibit moderate to good herbicidal and fungicidal activities. Some possess 90-100% inhibition against most of the tested plants at the dosage of 1500 g ai/ha, whereas others possess 92-100% inhibition against Fusarium oxysporum, Phyricularia grisea, Botrytis cinereapers, Gibberella zeae, Sclerotinia sclerotiorum, and Cercospora beticola at the concentration of 50 mg/L.

Journal of Heterocyclic Chemistry published new progress about 163839-73-4. 163839-73-4 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Carboxylic acid,Benzene,Ether, name is 2-(4-(Trifluoromethyl)phenoxy)acetic acid, and the molecular formula is C14H20BClO2, Recommanded Product: 2-(4-(Trifluoromethyl)phenoxy)acetic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

An, Zhenyu published the artcileA catalyst-free method for the synthesis of 1,4,2-dithiazoles from isothiocyanates and hydroxylamine triflic acid salts, Recommanded Product: O-Pivaloylhydroxylamine trifluoromethanesulfonate, the publication is Organic & Biomolecular Chemistry (2021), 19(28), 6206-6209, database is CAplus and MEDLINE.

A catalyst-free method for the preparation of 1,4,2-dithiazoles I (R = C₆H₅, 3-FC₆H₄, Bn, etc.) is developed by reactions of isothiocyanates with hydroxylamine triflic acid salts. This reaction achieves C-S, C-N, and S-N bond formation, and a range of products are obtained in moderate to good yields. The obvious feature is using shelf-stable hydroxylamine triflic acid salts as a N source to synthesize heterocycles under mild conditions.

Organic & Biomolecular Chemistry published new progress about 1293990-73-4. 1293990-73-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is O-Pivaloylhydroxylamine trifluoromethanesulfonate, and the molecular formula is C6H12F3NO5S, Recommanded Product: O-Pivaloylhydroxylamine trifluoromethanesulfonate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Seyferth, Dietmar published the artcileOrganometallic Chemistry of Ambident Dianions. Reactions of Organosilicon Dihalides with Acetone Dianions. Remarkable Difference in Reactivity between Diorganodichlorosilanes and Diorganodifluorosilanes, Computed Properties of 312-40-3, the publication is Organometallics (1995), 14(5), 2136-8, database is CAplus.

The [CH₂C(O)CPh₂]^2- dianion reacted with R₂SiCl₂ (R = Ph, CH₃, Et) to give cyclic products I but with R₂SiF₂ cyclic products II (R = Ph, Et) were formed. The structures of I and II (R = Ph) were determined by single-crystal x-ray diffraction. A reason for the difference in the regioselectivity of the reactions of the dianion with R₂SiCl₂ and R₂SiF₂ is suggested.

Organometallics published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C10H15ClO3S, Computed Properties of 312-40-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Seyferth, Dietmar published the artcileReactions of the 1,1-Diphenylacetone-Derived Dianion as a C,O-Dinucleophile with Organohalosilanes and -germanes, COA of Formula: C12H10F2Si, the publication is Organometallics (1997), 16(11), 2413-2426, database is CAplus.

1,1-Diphenylacetone dianion reacts with diorganodichlorosilanes to give 1,1,5,5-tetraorgano-3,7-bis(diphenylmethylene)-1,5-disila-2,8-dioxacyclooctanes, while 1,1-diphenylacetone dianion reacts with diorganodifluorosilanes to give a positional isomer, 1,1,5,5-tetraorgano-3,7-bis(diphenylmethylene)-1,5-disila-2,6-dioxacyclooctane. The structures of 1,1,5,5-tetraphenyl-3,7-bis(diphenylmethylene)-1,5-disila-2,8-dioxyacyclooctane and 1,1,5,5-tetraphenyl-3,7-bis(diphenylmethylene)-1,5-disila-2,6-dioxacyclooctane were determined by x-ray crystallog. A 10-membered cyclic compound and a 6-membered cyclic compound also were prepared by the reaction of 1,1-diphenylacetone dianion with 1,2-dichlorotetramethyldisilane and 1,3-dichlorohexamethyltrisilane, resp. The structure of 1,1,2,2,6,6,7,7-octamethyl-4,9-bis(diphenylmethylene)-1,2,6,7-tetrasila-3,10-dioxacyclodecane was determined by x-ray crystallog. 1,1-Diphenylacetone dianion reacts with diphenyldichlorogermane and diphenyldifluorogermane to give 1,1,5,5-tetraphenyl-3,7-bis(diphenylmethylene)-1,5-digerma-2,6-dioxacyclooctane. The structure of 1,1,5,5-tetraphenyl-3,7-bis(diphenylmethylene)-1,5-digerma-2,6-dioxacyclooctane was determined by x-ray crystallog. A possible explanation for the difference in the reactions observed with Ph₂SiCl₂ and Ph₂SiF₂ is presented. Experiments involving reactions of the 1,1-diphenylacetone dianion with monochlorosilanes indicate that a Si-CH₂, not an Si-O, bond is formed first.

Organometallics published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C5H12O2, COA of Formula: C12H10F2Si.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Li, Bo published the artcileSynthesis of Oxazolines from Amides via Palladium-Catalyzed Functionalization of Unactivated C(sp³)-H Bond, Formula: C11H14O2, the publication is Organic Letters (2015), 17(5), 1200-1203, database is CAplus and MEDLINE.

A complementary method that enables the expeditious synthesis of oxazolines from amides via Pd-catalyzed C(sp³)-H functionalization has been described. Preliminary studies indicate that the reaction might go through a chlorination/nucleophilic cyclization sequence, and the high efficiency of this sequence is enhanced by the in situ cyclative capture of the chlorinated intermediate. The resulting oxazolines can be further converted into the corresponding ¦Â-amino alcs. without chromatog.

Organic Letters published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C11H14O2, Formula: C11H14O2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia