The current state-of-the-art synthesis for the formation of enantiomerically enriched all-carbon quaternary stereocenters in acyclic system relies on the formation of a single carbon-carbon bond per chemical step by asymmetric catalysis. These extraordinary sophisticated methods were logically classified among the most powerful and innovative ones. In this concept article, we are proposing a new retrosynthetic
Four-Component Reactions for a New Diastereoselective Synthesis of Chiral Quaternary Centers
作者:Genia Sklute、Deborah Amsallem、Amal Shabli、Jos P. Varghese、Ilan Marek
DOI:10.1021/ja036872t
日期:2003.10.1
The one-pot preparation of chiral homoallylic alcohol and amine derivatives was easily achieved by carbocupration of alkynyl sulfoxides followed by an in situ zinc homologation and reaction with aldehydes or imines. In this process, three new carbon-carbon bonds were created as well as quaternary and tertiary chiral centers with excellent diastereo- and enantioselectivities.
New Multicomponent Approach for the Creation of Chiral Quaternary Centers in the Carbonyl Allylation Reactions
作者:Genia Sklute、Ilan Marek
DOI:10.1021/ja060498q
日期:2006.4.1
combined regio- and stereo-controlled carbometalation reaction of alkynyl sulfoxide followed by a zinc homologation and finally an allylation reaction led, in a single-pot operation, to chiral homoallylic alcohols in excellent yields and diastereoselectivities for the creation of chiral quaternary and tertiary centers. The key features in all of the reactions that are described in this article are the high