Catalytic Enantioselective Hydrogenation of N-Alkoxycarbonyl Hydrazones: A Practical Synthesis of Chiral Hydrazines
摘要:
An enantioselective hydrogenation of hydrazones catalyzed by Rh complexes (Rh-Josiphos or Rh-Taniaphos) has been developed. The protocol can be applied to hydrazones with three different protective groups (Boc, Cbz, and methoxycarbonyl), allowing for selective deprotection and further elaboration of the hydrazine products in the presence of other functional groups.
Pyrazole derivatives, compositions containing such compounds and methods of use
申请人:Parmee R. Emma
公开号:US20070088070A1
公开(公告)日:2007-04-19
Pyrazoles having a naphthyl group attached are disclosed. The compounds are useful for treating type 2 diabetes and related conditions. Pharmaceutical compositions and methods of treatment are also included.
Catalytic Enantioselective Hydrogenation of <i>N</i>-Alkoxycarbonyl Hydrazones: A Practical Synthesis of Chiral Hydrazines
作者:Naoki Yoshikawa、Lushi Tan、J. Christopher McWilliams、Deepa Ramasamy、Ruth Sheppard
DOI:10.1021/ol902602c
日期:2010.1.15
An enantioselective hydrogenation of hydrazones catalyzed by Rh complexes (Rh-Josiphos or Rh-Taniaphos) has been developed. The protocol can be applied to hydrazones with three different protective groups (Boc, Cbz, and methoxycarbonyl), allowing for selective deprotection and further elaboration of the hydrazine products in the presence of other functional groups.