Kinetic Resolution of Activated Nitroallylic Acetates with Aldehydes and Ketones through a Conjugate Addition-Elimination SN2′ Process
作者:Raju Jannapu Reddy、Pei-Hsun Lee、Dhananjay R. Magar、Jung-Hsuan Chen、Kwunmin Chen
DOI:10.1002/ejoc.201101162
日期:2012.1
A unique organocatalytic kineticresolution (KR) of nitroallylicacetates has been developed. A variety of racemic nitroallylicacetates (1a–n) were resolved with chiral enamines formed in situ from the reaction of aldehydes and ketones with organocatalyst 2b (2.5 mol-%) and 14c (20 mol-%), respectively, through an interesting SN2′ reaction. The densely functionalized products 3–5 were obtained with