作者:Manfred Braun、Hubert Sacha、Dietmar Galle、Abdullah El-Alali
DOI:10.1016/0040-4039(95)00772-5
日期:1995.6
of doubly deprotonated triphenylglycol propionate 4a and imines 1 leads to the formation of trans β-lactams 5 in a diastereoselective and enantioselective manner (85 to > 97% e.e.). On the other hand, the lithium enolates of the propionates 4b,c, derived from triphenylglycol as well, afford predominantly cis 2-azetidinones 6 in 87 to > 97% e.e.
双去质子化丙酸三苯二醇酯4a和亚胺1的缩合导致以非对映选择性和对映选择性的方式形成反式β-内酰胺5(ee介于85%到97%以上)。另一方面,也衍生自三苯乙二醇的丙酸酯4b,c的烯醇锂主要在87%到> 97%ee的范围内提供顺式2-氮杂环丁酮6