Optically Active 2,3-Allenoates<i>via</i>Palladium-Catalyzed Carbonylation of Enantioenriched Propargylic Mesylates
作者:Yuli Wang、Shengming Ma
DOI:10.1002/adsc.201200910
日期:2013.3.11
Under mild conditions, opticallyactive 2,3‐allenoates were synthesized from enantioenrichedpropargylicmesylates with moderate to excellent yields and high efficiency of chirality transfer by using palladium(0) bis(dibenzylideneacetone) (3 mol%) with (S)‐(−)‐5,5′‐bis(diphenylphosphino)‐4,4′‐bi‐1,3‐benzodioxole [(S)‐SEGPHOS] (3 mol%) as the catalyst and diammonium hydrogen phosphate (1.1 equiv .)
Preparation of Optically Pure Beta-Amino Acids Having Affinity for the Alpha-Delta Protein
申请人:Herrinton Paul Matthew
公开号:US20080194841A1
公开(公告)日:2008-08-14
Disclosed are materials and methods for preparing optically active β-amino acids, which bind to the alpha-2-delta subunit of a calcium channel and are useful for treating pain, fibromyalgia, and a variety of psychiatric and sleep disorders. The method includes reacting a chiral allyl amine with a 2-alkynoate in the presence of a Lewis acid and a base to give a chiral tertiary enamine, which after reaction with ammonia, is hydrogenated to give optically active β-amino acids.