Asymmetric synthesis of bicyclopropane derivatives
作者:Anthony G.M. Barrett、Wendel W. Doubleday、Gary J. Tustin
DOI:10.1016/s0040-4020(96)00934-9
日期:1996.11
Both syn-and anti-bicyclopropane derivatives have been prepared with good relative and absolute stereocontrol using reagent controlled asymmetric cyclopropanation reactions. Double Simmons-Smith cyclopropanation of 2,4-dien-1-ols stereoselectively gave the corresponding anti-bicyclopropane derivatives.
beta-sheet mimetics and composition and methods relating thereto
申请人:Myriad Pharmaceuticals, Inc.
公开号:US20040014763A1
公开(公告)日:2004-01-22
Compounds having the following structure:
1
including pharmaceutically acceptable salts and stereoisomers thereof, wherein A, A′, B, X, Y, R
2
, R
3
, R
4
and R
5
are as defined herein. Such compounds have utility over a wide range of applications, including use as diagnostic and therapeutic agents. In particular, compounds of this invention, and pharmaceutical compositions containing such compounds, are tryptase antagonists.
Catalytic Regio- and Enantioselective Alkylation of Conjugated Dienyl Amides
作者:Yafei Guo、Johanan Kootstra、Syuzanna R. Harutyunyan
DOI:10.1002/anie.201808392
日期:2018.10.8
A method for catalytic asymmetric alkylation of conjugated dienyl amides has been developed and it allows efficient and high‐yielding transformations of a wide range of polyconjugated amides into the corresponding chiral products. Smooth addition of organomagnesium reagents to relatively unreactive dienyl amides with excellent 1,6‐ and 1,4‐selectivities, as well as enantioselectivites above 90 %, is
Simple procedures for the transformation of vinyl oxiranes to trans, trans-dienes and regio- and stereocontrolled unsaturated bromohydrins are reported.