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