作者:Motoo Muroi、Yuzo Inouye、Minoru Ohno
DOI:10.1246/bcsj.42.2948
日期:1969.10
A partial asymmetric synthesis was achieved in the carbon-carbon condensation which involved the reaction of (−)-menthyl pyruvate with trimethyl phosphite, followed by alkaline hydrolysis of the intermediate cyclic oxyphosphorane to yield (−)-(S:S)-2,3-dimethyltartaric acid. With knowledge of absolute configurations of both the chiral center and the predominant enantiomer of the product, an ex post facto interpretation of the steric course was made on the basis of relative steric stability of transition state conformations of the addition step of III to I.
在碳-碳缩合过程中实现了部分不对称合成,包括(-)-丙酮酸门酯与亚磷酸三甲酯的反应,然后对中间环氧磷烷进行碱性水解,生成(-)-(S:S)-2,3-二甲基酒石酸。在了解了手性中心和产物的主要对映体的绝对构型后,根据 III 与 I 的加成步骤的过渡态构象的相对立体稳定性,对立体过程进行了事后解释。