Chiral α-Substituted Carbonyls and Alcohols from the S<sub>N</sub>2‘ Displacement of Cuprates on Chiral Carbonates: An Alternative to the Alkylation of Chiral Enolates
A highlystereoselective sequence of reactions, based on the anti-selective S(N)2' addition of cuprates to allylic carbonates, transforms alkynes or alkenyl halides into carbonyls having alpha-chiral centers. The method, which uses menthone as a chiral auxiliary, is a useful alternative to the alkylation of chiralenolates with the added advantage of allowing for the "alkylation" of sec- and tert-alkyl
Stereochemistry of the sn2′ displacement of chiral 1, 3-disubstituted bromoallenes to form chiral acetylenes
作者:E.J. Corey、Neil W. Boaz
DOI:10.1016/0040-4039(84)80007-6
日期:——
Optically active 1,3-disubstituted bromoallenes react with a variety of cuprate reagents preferentially in an SN2′ fashion with very high anti selectivity.
光学活性的1,3-二取代的溴化亚丙烯优先以S N 2'的方式与多种铜酸盐试剂反应,并具有很高的抗选择性。
PICOLINAMIDE DERIVATIVES AS TTX-S BLOCKERS
申请人:Noguchi Hirohide
公开号:US20120142691A1
公开(公告)日:2012-06-07
The present invention relates to picolinamide derivatives which have blocking activities of voltage gated sodium channels as the TTX-S channels, and which are useful in the treatment or prevention of disorders and diseases in which voltage gated sodium channels are involved. The invention also relates to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which voltage gated sodium channels are involved.