ZnCl2 and CuCl promoted aldol reactions of isocyanoacetate with α,β-unsaturated carbonyl compounds
作者:Yoshihiko Ito、Takaharu Matsuura、Takeo Saegusa
DOI:10.1016/s0040-4039(00)98925-1
日期:——
Reaction of ethyl isocyanoacetate with α,β-unsaturatedcarbonylcompounds was promoted by a stoichiometric amount of ZnCl2 or a catalytic amount of CuCl/Et3N (1:1) to give 5-alkenyl-4-carboethoxyoxazolines (3) in moderate yields. The oxazolines (3) were converted by palladium catalyst to 2-formamino-2,4-alkadienoic acid ethyl esters (5).
通过化学计算量的ZnCl 2或催化量的CuCl / Et 3 N(1:1)促进异氰基乙酸乙酯与α,β-不饱和羰基化合物的反应,得到中等程度的5-烯基-4-羰基乙氧基恶唑啉(3)产量。通过钯催化剂将恶唑啉(3)转化为2-甲氨基-2,4-链二烯酸乙酯(5)。