作者:Arturo Battaglia、Gaetano Barbaro、Patrizia Giorgianni、Andrea Guerrini、Antonella Pepe
DOI:10.1016/s0957-4166(01)00173-2
日期:2001.5
1,3-Dioxolanone alcohols, prepared via the addition of chiral lithium enolates of 1,3-dioxolan-4-ones to aldehydes, are suitable intermediates for the synthesis of chiral trisubstituted isoserines or trisubstituted 3-hydroxy-β-lactams. In particular, the methyl ester of 2-methyl-3-(2-furyl)isoserinic acid and two 3-methyl-3-hydroxy-β-lactams bearing either a 2-furyl or a phenyl substituent at C-(4)
通过将1,3-二氧戊环-4-酮的手性烯醇锂加成到醛中而制备的1,3-二氧戊环醇是合适的中间体,用于合成手性三取代的异丝氨酸或三取代的3-羟基-β-内酰胺。特别地,在C-(4)处带有2-呋喃基或苯基取代基的2-甲基-3-(2-呋喃基)异癸二酸甲酯和两个3-甲基-3-羟基-β-内酰胺具有准备好了。(2 - [R,3小号)异丝氨酸的立体化学,和(3 - [R,4小号的是必需的)两个β内酰胺类的立体化学为具有侧链与适当的(2'紫杉烷类似物的合成ř,3 'S)配置。