“One-Pot” Access to 4<i>H</i>-Chromenes with Formation of a Chiral Quaternary Stereogenic Center by a Highly Enantioselective Iminium-allenamine Involved Oxa-Michael−Aldol Cascade
作者:Chunliang Liu、Xinshuai Zhang、Rui Wang、Wei Wang
DOI:10.1021/ol102096s
日期:2010.11.5
organocatalytic highlyenantioselectivecascade Michael−aldol reaction has been developed in high yields under mild reaction conditions. The “one-pot” process affords an efficient approach to the synthetically and biologically important chiral4H-chromenes bearing a quaternary stereogenic center. The study significantly expands the scope of less explored organocatalytic iminium-allenamine chemistry.
N-substituted-2-hydroxy-.alpha.-oxo-benzeneacetamides and pharmaceutical
申请人:Warner-Lambert Company
公开号:US04939133A1
公开(公告)日:1990-07-03
The present invention relates to novel N-substituted 2-hydroxybenzamide and N-substituted 2-hydroxy-.alpha.-oxo-benezene acetamide compounds pharmaceutical compositions, and methods of use for therefore for the treatment of diseases in which products having lipoxygenase enzyme activity contribute to the pathological condition. Selected novel intermediates are also the present invention.
(N-substituted-2-hydroxy) benzamides and N-substituted-2-hydroxy-alpha-oxo-benzeneacetamides and pharmaceutical compositions thereof having activity as modulators of the arachidonic acid cascade