(S)-α-carboxymethyl-proline 3 and (S)-α-2-carboxyethyl-proline 4, using a chirality-transferring ester-enolate Claisen rearrangement of α-vinyl-α-acyloxysilane having a Boc-Pro as an acyloxy group, are described. The stereochemical outcome of the proline ester-derived ester-enolate Claisen rearrangement is also disclosed.
立体选择性合成
吡咯烷的
天冬氨酸和谷
氨酸类似物,(S)-α-羧甲基-脯
氨酸3和(S)-α-2-羧乙基-脯
氨酸4,使用α-
乙烯基的手性转移酯-烯醇酸克莱森重排描述了具有Boc-Pro作为酰氧基的-α-酰氧基
硅烷。还公开了脯
氨酸酯衍生的酯-烯酸酯Claisen重排的立体
化学结果。