A Concise and Stereoselective Synthesis of Hydroxypyrrolidines: Rapid Synthesis of (+)-Preussin
作者:Jason A. Draper、Robert Britton
DOI:10.1021/ol101631e
日期:2010.9.17
A convergent and stereoselective synthesis of 2,5-disubstituted 3-hydroxypyrrolidines has been developed that involves reductive annulation of beta-Iminochlorohydrins, which are readily available from beta-ketochlorohydrins, and provides rapid access to a variety of 2,5-syn-pyrrolidines. Application of this process to the concise (three-step) synthesis of the fungal metabolite (+)-preussin and analogues of this substance is reported.
An efficient method for the preparation of 3-hydroxyl-5-substituted 2-pyrrolidones and application in the divergent synthesis of (−)-preussin and its analogues
An asymmetric method to (S,R)-α-hydroxyl-γ-amino alcohols 12 through a diastereoselective addition of Grignard reagents to β-chiral aldimines 11 is described. Subsequent oxidation/cyclization with Sarett reagent provided a novel approach to lactams 14, a flexible building block whose utility was demonstrated in the divergent synthesis of antifungal agent (−)-preussin 5 and its three analogues 23, 24
描述了通过将格氏试剂非对映选择性地添加到β-手性醛亚胺11上的(S,R)-α-羟基-γ-氨基醇12的不对称方法。与Sarett随后的氧化/环化试剂提供了一种新颖的方法来内酰胺14,柔性积木其效用在抗真菌剂的发散合成证实( - ) - preussin 5和它的三个类似物23,24,25。