Synthesis and in vitro evaluation of botryllazine B analogues as a new class of inhibitor against human aldose reductase
摘要:
Botryllazine B analogues of diverse substitution patterns have been prepared, and their in vitro inhibitory activities against recombinant human aldose reductase (h-ALR2) evaluated. Among the 15 compounds tested, 6-(4-aminophenyl)-2-(4-hydroxyphenyl)carbonylpyrazine (7b) proved to be the most potent inhibitor, with IC50=0.91 mu M. Kinetic analyses of 7b and botryllazine B(1) revealed that these inhibitors exhibit an unprecedented mixed-type inhibition on h-ALR2 with respect to the substrate D,L-glyceraldehyde, in the presence of NADPH at inhibitor concentrations near the IC50 values. (C) 2009 Elsevier Ltd. All rights reserved.
A highly active catalytic system for Suzuki–Miyaura cross-coupling reactions of aryl and heteroaryl chlorides in water
作者:Shu-Lan Mao、Yue Sun、Guang-Ao Yu、Cui Zhao、Zhi-Jun Han、Jia Yuan、Xiaolei Zhu、Qihua Yang、Sheng-Hua Liu
DOI:10.1039/c2ob26463c
日期:——
An easily available Pd(OAc)2/(2-mesitylindenyl)dicyclohexylphosphine/Me(octyl)3N+Cl−/K3PO4·3H2O catalytic system was developed and it shows high catalytic activity in the Suzuki–Miyaura cross-coupling reaction of a diverse array of aryl and heteroaryl chlorides in water. Notably, this catalytic system also works with ultra-low loading of the catalyst with high turnover numbers.
容易获得的Pd(OAc)2 /(2-异丁烯基)二环己基膦/ Me的(辛基)3 Ñ +氯- / K 3 PO 4 ·3H 2 ö催化体系被开发,它示出了在芳基和杂芳基氯化物的多样性阵列的Suzuki-Miyaura交叉偶联反应的高催化活性水。值得注意的是,该催化系统还可以在超低负荷下以高周转数运行。
Use of N-oxide compounds in coupling reactions
申请人:Fagnou Keith
公开号:US20080132698A1
公开(公告)日:2008-06-05
Metal-catalyzed coupling process comprising reacting a compound of general formula 1 with a compound A-X, to obtain a compound of general formula 2, which may further be converted to a compound of general formula 3
The synthesis of several symmetrical polyaromatic compounds with pyridine or diazine units has been achieved by homocoupling of aryl halides with Pd(OAc)2 as catalyst. Cross-coupling reactions of aryl Grignard reagents with Fe(acac)3 as catalyst allowed the synthesis of various unsymmetrical polyaryl- or polyheteroaryl compounds with TTπ-deficient rings.
An easily available Pd(OAc)2/(2-(anthracen-9-yl)-1H-inden-3-yl) dicyclohexylphosphine/toluene/iPrOH/water catalyticsystem was developed, which shows high catalytic activity in the Suzuki–Miyaura cross-coupling reactions of a diverse array of aryl and heteroaryl chlorides with Pd loadings down to 0.01 mol%.