Pyridine derivatives, with potassium channel opening activity
申请人:Takeda Chemical Industries, Ltd.
公开号:EP0623597B1
公开(公告)日:1997-10-22
US5716971A
申请人:——
公开号:US5716971A
公开(公告)日:1998-02-10
Pyridine derivatives, their production and use
申请人:Takeda Chemical Industries, Ltd.
公开号:US05716971A1
公开(公告)日:1998-02-10
Pyridine derivatives of the formula ##STR1## wherein the ring A stands for an optionally further substituted benzene ring; the ring B stands for an optionally substituted pyridine ring; Q stands for hydroxyl group, or OQ.sup.1 or Q.sup.1 wherein Q.sup.1 stands for an optionally substituted aliphatic hydrocarbon group; and n denotes 0 or 1, or their salts, which have potassium.channel opening activity and are useful as therapeutic agents of circulatory diseases such as angina pectoris, hypertension, etc.
Asymmetric Synthesis of Bioactive Hydrodibenzofuran Alkaloids: (−)-Lycoramine, (−)-Galanthamine, and (+)-Lunarine
作者:Peng Chen、Xu Bao、Le-Fen Zhang、Ming Ding、Xiao-Jie Han、Jing Li、Guo-Biao Zhang、Yong-Qiang Tu、Chun-An Fan
DOI:10.1002/anie.201103198
日期:2011.8.22
Divergent route: A direct CC bond‐forming approach to the key aryl‐substituted all‐carbon quaternary stereogenic center present in bioactive hydrodibenzofuran alkaloids has been discovered. This approach involves an unprecedented organocatalyticenantioselectiveMichaeladdition of α‐cyanoketones with acrylates (see scheme) and was used in a novel and divergent synthetic strategy for the title compounds