4,5-DIHYDRO-1H-PYRAZOLE DERIVATIVE OR SALTS THEREOF, AND PHARMACEUTICAL COMPOSITION COMPRISING SAME
申请人:YUHAN CORPORATION
公开号:US20150291563A1
公开(公告)日:2015-10-15
The present invention provides a 4,5-dihydro-1H-pyrazole derivative or its pharmaceutically acceptable salt, a process for the preparation thereof, and a pharmaceutical composition comprising the same. The 4,5-dihydro-1H-pyrazole derivative or its pharmaceutically acceptable salt effectively increases the LXR transcriptional activity, and therefore can be usefully applied for preventing or treating a dysfunction in cholesterol metabolism, such as cholesterol gallstone, hyperlipidemia, or coronary atherosclerosis.
An enantioselective Si‐H insertion between α‐arylvinyldiazoesters and silanes has been developed by employing rhodium(I)/chiral diene complex as the catalyst. This protocol offers a catalytic asymmetric approach to various chiral silanes containing α‐arylvinyl functionality at room temperature with good enantiocontrol (89‐99% ee). Transformation of the resulting enantiomerically enriched α‐arylvinyl‐α‐silyl
Deracemisation of aryl substituted α-hydroxy esters using Candida parapsilosis ATCC 7330: effect of substrate structure and mechanism
作者:B. Baskar、N.G. Pandian、K. Priya、Anju Chadha
DOI:10.1016/j.tet.2005.09.104
日期:2005.12
Candida parapsilosis ATCC 7330 was found to be an efficient biocatalyst for the deracemisation of aryl alpha-hydroxy esters (65-85% yield and 90-99% ee). A variety of aryl and aryl substituted alpha-hydroxy esters were synthesized to reflect steric and electronic effects on biocatalytic deracemisation. The mechanism of this biocatalytic deracemisation was found to be stereoinversion. (c) 2005 Elsevier Ltd. All rights reserved.
Bodforss, Justus Liebigs Annalen der Chemie, 1957, vol. 609, p. 103,117