Catalytic Asymmetric [4+2]-Cycloaddition of Dienes with Aldehydes
作者:Luping Liu、Hyejin Kim、Youwei Xie、Christophe Farès、Philip S. J. Kaib、Richard Goddard、Benjamin List
DOI:10.1021/jacs.7b08357
日期:2017.10.4
Despite its significant potential, a general catalytic asymmetric [4+2]-cycloaddition of simple and electronically unbiased dienes with any type of aldehyde has long been unknown. Previously developed methodologies invariably require activated, electronically engineered substrates. We now provide a general solution to this problem. We show that highly acidic and confined imidodiphosphorimidates (IDPis)
Stereoselective Synthesis of Alkenyl Alcohols Using Dissolving Metal (Ca,Na) Reduction
作者:Jingyao Zhou、Guodi Lu、Xin Huang、Shihui Wu
DOI:10.1080/00397919108016767
日期:1991.2
Abstract Use of the calcium-ethylenediamine and sodium-liquidammoniareduction systems for the ring opening of dihydropyran derivatives was studied. (Z)-Alkenyl alcohols and (E)-alkenyl alcohols were stereoselectively synthesized respectively.