Asymmetric synthesis of 3S, 4R-dihydroxypyrrolidines by regio- and stereoselective hydroxylation of 4-oxoproline enolate
作者:M.Jesús Blanco、F.Javier Sardina
DOI:10.1016/s0040-4039(00)74441-8
日期:1994.11
enantiomerically pure (2R, 3S, 4R) 3,4-dihydroxy-2-hydroxymethylpyrrolidine, a galactosidase inhibitor, from 4-hydroxy-L-proline is presented. The key steps are the regio- and stereoselective hydroxylation of a 4-oxoproline enolate and the stereoselective reduction of the resulting ketoalcohol. An N-(9-phenylfluoren-9-yl) moiety is used not only as an N-protecting group but as a regio- and stereochemical control
提出了从4-羟基-L-脯氨酸的对映体纯的(2 R,3 S,4 R)3,4-二羟基-2-羟甲基吡咯烷酮(一种半乳糖苷酶抑制剂)的短而有效的立体选择性合成。关键步骤是4-氧代脯氨酸烯醇的区域和立体选择性羟基化以及所得酮醇的立体选择性还原。一个ñ - (9-苯基芴-9-基)部分不仅用作一个ñ -保护基团,但作为一个区域选择性和立体化学控制元件为好。