Synthesis in ionic liquids only: access to α-oxo-γ-thio-esters via Mukaiyama coupling
作者:Khouloud Jebri、Marie-Rose Mazières、Stéphanie Ballereau、Taïcir Ben Ayed、Jean-Christophe Plaquevent、Michel Baltas、Frédéric Guillen
DOI:10.1016/j.tetlet.2014.01.024
日期:2014.2
Ionic liquids are solvents general enough to conduct a multi-step process in organic synthesis. We show that both the preparation of starting materials (thioacetals and enoxysilane) as well as their coupling can be realized in such medium. (C) 2014 Elsevier Ltd. All rights reserved.
Direct Synthesis of β,γ-Unsaturated α-Keto Esters from Aldehydes and Pyruvates
作者:John Mansaray、Jiarui Sun、Shisheng Huang、Weijun Yao
DOI:10.1055/s-0037-1612255
日期:2019.4
methods to synthesize β,γ-unsaturated α-keto esters directly from aldehydes and pyruvates promoted by BF3•Et2O in the presence of Ac2O or by Ti(OEt)4 under mild conditions. A variety of aromatic aldehydes was tolerated to afford the desired products in moderate to excellent yield. Moreover, aliphatic aldehydes and Isatin were also employed to give the γ-alkyl β,γ-unsaturated α-keto esters in moderate yield