One-Pot Lewis Acid Mediated Water-Promoted Transformation of Styrenes to α-Substituted Conjugated Enals
作者:Ekaterina S. Kudriashova、Margarita A. Yarushina、Andrei E. Gavryushin、Ivan D. Grishin、Yulia B. Malysheva、Vasilii F. Otvagin、Alexey Yu. Fedorov
DOI:10.1021/acs.orglett.3c01576
日期:2023.7.14
We report herein an unusual one-pot preparation of α-benzyl-substituted conjugated enals via ZnCl2/LiCl/H2O-mediated transformation of styrenes. On the basis of experimental and computational studies, an underlying mechanism including electrophilic addition and hydride transfer with iminium cations has been proposed. The effect of the LiCl/ZnCl2/H2O combination on the reaction yield has been studied
Preparation of α-substituted acroleins via the reaction of aldehyde or the corresponding ozonide with dihalomethane and diethylamine
作者:Yung-Son Hon、Feng-Jon Chang、Ling Lu、Wei-Chi Lin
DOI:10.1016/s0040-4020(98)00216-6
日期:1998.5
Treatment of aldehydes or the corresponding ozonides with a mixture of dibromomethane and diethylamine afforded α-substituted acroleins in modest to good yields. The β-carbon of the acrolein (nc, n = 1–16) derived from dibromomethane. Functional groups, such as ketone, hydroxy, acetoxy, bromide, iodide, ester are compatible with this reaction condition. The relative rates and yields of this transformation