efficient catalytic asymmetric hydrogenation of racemic α‐arylcyclohexanones with an ethylene ketal group at the 5‐position of the cyclohexane ring via dynamic kinetic resolution has been developed, giving chiral α‐arylcyclohexanols with two contiguous stereocenters with up to 99% ee and >99:1 cis/trans‐selectivity. Using this highly efficient asymmetric hydrogenation reaction as a key step, (−)‐α‐lycorane
N'-dioxide-Sc(III) complex catalysts. The BV oxidations of prochiral cyclohexanones and cyclobutanones afforded series of optically active ε- and γ-lactones, respectively, in up to 99% yield and 95% ee. Meanwhile, the kinetic resolution of racemic 2-arylcyclohexanones was also realized via an abnormal BV oxidation. Enantioenriched 3-aryloxepan-2-ones, whose formation is counter to the migratoryaptitude, were
PYRROLINONE CARBOXAMIDE COMPOUNDS USEFUL AS ENDOTHELIAL LIPASE INHIBITORS
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20140228321A1
公开(公告)日:2014-08-14
The present invention provides compounds of Formula (I): (I), as defined in the specification and compositions comprising any of such novel compounds. These compounds are endothelial lipase inhibitors which may be used as medicaments.
PYRIMIDINONE CARBOXAMIDE INHIBITORS OF ENDOTHELIAL LIPASE
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20150065505A1
公开(公告)日:2015-03-05
The present invention provides compounds of Formula (I), as defined in the specification and compositions comprising any of such novel compounds. These compounds are endothelial lipase inhibitors which may be used as medicaments.
Copper-Catalyzed Enantioselective Hydrosilylation of Allenes to Access Axially Chiral (Cyclohexylidene)ethyl Silanes
作者:Shu Li、Jian-Lin Xu、Yun-He Xu
DOI:10.1021/acs.orglett.2c02359
日期:2022.8.19
A novel strategy of copper-catalyzed regio- and enantioselective hydrosilylation of 4-substituted vinylidenecyclohexanes with silanes was developed. In this protocol, various allenes and silanes were used to afford the corresponding (cyclohexylidene)ethyl silanes in moderate to high yields with good enantioselectivities.