Method for producing optically active 3-hydroxyhexanoic acids using
申请人:Chisso Corporation
公开号:US05643793A1
公开(公告)日:1997-07-01
A method for producing an optically active 3-hydroxy-hexanoic acid represented by formula (1) and the enantimer by asymmetrically hydrolyzing a racemic ester of 3-hydroxyhexanoic acid in the presence of a lipase derived from porcine pancreas. ##STR1##
作者:J. D. Parrish、Daniel R. Shelton、R. Daniel Little
DOI:10.1021/ol035269c
日期:2003.10.1
A novel method for the promotion of Reformatsky-like reactions is presented. The technique employs titanocene(Ill) chloride as a mild and homogeneous single-electron reductant. The reactions are rapid, operationally simple, and compatible with a wide range of functionalities. These additions are also anti diastereoselective.
US5643793A
申请人:——
公开号:US5643793A
公开(公告)日:1997-07-01
Synthesis and antitumour activity of β-hydroxyisovalerylshikonin analogues
作者:Zhen Rao、Xin Liu、Wen Zhou、Jing Yi、Shao-Shun Li
DOI:10.1016/j.ejmech.2011.05.065
日期:2011.9
β-hydroxyisovalerylshikonin analogues bearing oxygen-containing substituents at the side-chain hydroxyl of shikonin were designed and synthesized. The cytotoxicities of these compounds were evaluated in vitro against multi-drug resistant (MDR) cell lines DU-145 and HeLa. Most compounds exhibited significant inhibitory activity on both cell lines. The structure–activity relationship showed the analogues with ether substituents