Asymmetric Tandem Wittig Rearrangement/Mannich Reactions
作者:Natalie C. Giampietro、John P. Wolfe
DOI:10.1002/anie.201000609
日期:2010.4.6
choice is yours: A highly stereoselective synthesis of α‐alkyl‐α‐hydroxy‐β‐amino esters is accomplished through a tandem Wittig‐rearrangement/Mannich reaction sequence. Transformations of N‐benzyl or N‐Boc imines proceed with high selectivity for formation of syn‐amino alcohol derivatives, whereas N‐Boc‐2‐(phenylsulfonyl)amines generate anti‐amino alcohol products. Auxiliary cleavage (transesterification