Rationally Designed Amide Donors for Organocatalytic Asymmetric Michael Reactions
作者:Bin Tan、Gloria Hernández-Torres、Carlos F. Barbas
DOI:10.1002/anie.201200996
日期:2012.5.29
Amide nucleophiles on demand: Rationallydesigned pyrazoleamides function as Michaeldonors in urea‐catalyzed asymmetricMichaelreactions with excellent chemical and optical yields (see scheme). The pyrazoleamide group performs as an ester equivalent, a directing group, an activating group, and functions as a good leaving group in further transformations of the product.