Aryl Radical Activation of C–O Bonds: Copper-Catalyzed Deoxygenative Difluoromethylation of Alcohols
作者:Aijie Cai、Wenhao Yan、Wei Liu
DOI:10.1021/jacs.1c04254
日期:2021.7.7
direct use of free alcohols without purification of the xanthate esters. Mechanistic studies are consistent with the hypothesis of aryl radicals being formed and initiating the cleavage of the C–O bonds of xanthate esters, to generate alkyl radicals as the key intermediates. This aryl radical activation approach represents a new strategy for the activation of alcohols as cross-coupling partners.
Enantioselective microbial hydrolysis of C1 and C2 dissymmetrical cyclic carbonates with disubstitution (methyl and another groups) has been developed. Pseudomonas diminuta (FU0090), a bacterium, efficiently catalyzes the hydrolysis of five-membered cyclic carbonates. While the trans-substrates are hydrolyzed with low enantioselectivities and/or reactivities, the microbe hydrolyzes the cis-substrates
[EN] QUINAZOLINE DERIVATIVES AS ERBB RECEPTOR TYROSINE KINASES<br/>[FR] DERIVES DE QUINAZOLINE UTILISES COMME TYROSINE KINASES DU RECEPTEUR ERBB
申请人:ASTRAZENECA AB
公开号:WO2005118572A1
公开(公告)日:2005-12-15
The invention concerns quinazoline derivatives of the formula (I), wherein each of R1, R2, R3, R4, R5, R6, R7, X1, Q1, m and n have any of the meanings defined in the description; processes for their preparation, pharmaceutical compositions containing them and their use in the manufacture of a medicament for use as an antiproliferative agent in the prevention or treatment of tumours which are sensitive to inhibition of erbB receptor tyrosine kinases.
Trichloro- and methyldichlorogermyl monochelates and dibromo- and dichlorogermyl bischelates derived from N,N-disubstituted amides of 2-hydroxycarboxylic acids
作者:D. V. Airapetyan、T. P. Murasheva、S. Yu. Bylikin、A. A. Korlyukov、A. G. Shipov、S. V. Gruener、E. P. Kramarova、Vad. V. Negrebetskii、S. A. Pogozhikh、G. Ya. Zueva、M. Yu. Antipin、Yu. I. Baukov
DOI:10.1007/s11172-012-0093-7
日期:2012.3
The reactions of GeCl4, GeBr4, and MeGeCl3 with O-trimethylsilyl derivatives of N,N-disubstitutedamides of 2-hydroxycarboxylic acids afforded pentacoordinate and hexacoordinate neutral (O,O)-mono- and (O,O)-bischelates. The reactions of glycolic acid derivatives with GeX4 produced bischelates X2Ge[OCH2C(O)NR2R3]27a,c,d (X = Cl, R2 = R3 = Me (a), (CH2)5 (c), (CH2CH2)2O (d)) and 8a (X = Br). By contrast
[EN] QUINAZOLINE DERIVATIVES AS ANTITUMOR AGENTS<br/>[FR] DERIVES DE QUINAZOLINE UTILISES COMME AGENTS ANTI-TUMEUR
申请人:ASTRAZENECA AB
公开号:WO2005026152A1
公开(公告)日:2005-03-24
A quinazoline derivative of the formula (I): (A chemical formula should be inserted here - please see paper copy enclosed) Formula I wherein the substituents are as defined in the text for use in the production of an anti proliferative effect which effect is produced alone or in part by inhibiting erbB2 receptor tyrosine kinase in a warm blooded animal such as man.