Asymmetric Conjugate Additions of Chiral Phosphonamide Anions to α,β-Unsaturated Carbonyl Compounds. A Versatile Method for Vicinally Substituted Chirons
作者:Stephen Hanessian、Arthur Gomtsyan、Nadia Malek
DOI:10.1021/jo000388g
日期:2000.9.1
Reactions of anions derived from chiral nonracemic allyl, crotyl, and cinnamyl bicyclic C(2)-symmetrical phosphonamides with alpha, beta-unsaturated cyclic ketones, esters, lactones, and lactams take place at the gamma-position of the reagents. The products are diastereomerically pure or enriched beta-substituted carbonyl compounds. The method also provides easy access to vicinal substitution of as
衍生自手性非外消旋烯丙基,巴豆基和肉桂基双环C(2)对称膦酰胺的阴离子与α,β-不饱和环酮,酯,内酯和内酰胺的反应在试剂的γ位发生。产物是非对映体纯的或富集的β-取代的羰基化合物。该方法还可以轻松地以一锅序列的方式多达三个立体定位中心的邻近取代,在某些情况下还包括季碳原子。