An expedient stereoselective synthesis of ( E )- α,β -unsaturated esters and thioesters using FeCl 3 ·6H 2 O
作者:Amar R. Mohite、Trimbak B. Mete、Ramakrishna G. Bhat
DOI:10.1016/j.tetlet.2017.01.024
日期:2017.2
Facile and convenient synthesis of α,β-unsaturatedesters and thioesters from alkylidene derivatives of Meldrum’s Acid is described. This method uses catalytic amount of FeCl3·6H2O (0.001–0.005 equiv) with alcohols/thiols (1 equiv) in dry CH3NO2 followed by catalytic amount of piperidine. A variety of α,β-unsaturatedesters and thioesters have been synthesized with high E-stereoselectivity in good
描述了从Meldrum's Acid的亚烷基衍生物容易且方便地合成α,β-不饱和酯和硫代酯。该方法在干燥的CH 3 NO 2中使用催化量的FeCl 3 ·6H 2 O(0.001-0.005当量)与醇/硫醇(1当量),然后催化量的哌啶。已经以高至优异的产率合成了具有高E-立体选择性的多种α,β-不饱和酯和硫代酯。该方法的应用通过辛辛酸,防晒剂和其他对甲氧基肉桂酸酯的克规模合成得到证明。