The present invention relates to a process for the preparation of nebivolol and, more particularly, to an improved process of synthesizing an alpha-haloketone of formula
a key intermediate in the preparation of nebivolol.
An efficient and practical enantiospecific synthesis of methyl chromanone- and chroman-2-carboxylates
作者:Dong Woon Kim、Md. Maqusood Alam、Young Hun Lee、M. Naseer A. Khan、Yong Zhang、Yong Sup Lee
DOI:10.1016/j.tetasy.2015.07.006
日期:2015.9
Chromanone-2-carboxylates and chroman-2-carboxylates are useful building blocks for the synthesis of a variety of bioactive compounds, such as repinotan, fidarestat, and nebivolol. An efficient and practical enantiospecific synthesis of chromanone-2-carboxylates and chroman-2-carboxylates has been accomplished using intramolecular Mitsunobu etherification of methyl (S)-2-hydroxy-4-oxo-4-(2'-hydroxy)phenylbutanoates derived from L-malic acid. (C) 2015 Elsevier Ltd. All rights reserved.
Agents for lowering the blood pressure
申请人:JANSSEN PHARMACEUTICA N.V.
公开号:EP0334429B1
公开(公告)日:1992-11-19
US6545040B1
申请人:——
公开号:US6545040B1
公开(公告)日:2003-04-08
Enantioselective Copper-Catalyzed Intramolecular Phenolic OH Bond Insertion: Synthesis of Chiral 2-Carboxy Dihydrobenzofurans, Dihydrobenzopyrans, and Tetrahydrobenzooxepines
Efficient: A copper‐catalyzed enantioselective intramolecular insertion of carbenoids into phenolic OHbonds has been developed. This method can be used for the synthesis of the title compounds in high yields and excellent enantioselectivities under mild and neutral conditions (see scheme). NaBArF=sodium tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate.
有效:一个铜催化卡宾成酚类的O对映选择性分子内插入 H键已经研制成功。该方法可用于在温和和中性条件下以高收率和出色的对映选择性合成标题化合物(参见方案)。NaBAr F =四[3,5-双(三氟甲基)苯基]硼酸钠。