Switchover of diastereofacial selectivity in the condensation reaction of optically active N-sulfinimine with ester enolate
作者:Tamotsu Fujisawa、Yuuji Kooriyama、Makoto Shimizu
DOI:10.1016/0040-4039(96)00707-1
日期:1996.5
Both diastereomers of β-aminoester can be obtained diastereoselectively in the reaction of optically active N-sulfinimine possessing 2-methyl-1,3-dioxolanyl group with ester enolate simply by changing the enolate metal species, additives, and solvents. The β-aminoester can be converted into the corresponding 3-unsubstituted β-lactam.
仅通过改变烯醇盐的金属种类,添加剂和溶剂,就可以在具有2-甲基-1,3-二氧戊环基的光学活性N-亚磺酰亚胺与烯醇酸酯的反应中非对映选择性地获得两种β-氨基酯的非对映异构体。可以将β-氨基酯转化为相应的3-未取代的β-内酰胺。