A short synthesis of 3-enoyltetramic acids employing a new acyl ylide conjugate of Meldrum’s acid
作者:Kevin Lovmo、Steffen Dütz、Marina Harras、Robert G. Haase、Wolfgang Milius、Rainer Schobert
DOI:10.1016/j.tetlet.2017.11.025
日期:2017.12
readily prepared in quantitative yield by reaction of Meldrum’sacid with the stable ylide Ph3PCCO. Its reaction with α-amino esters affords the corresponding N-(β-ketoacyl)amino ester ylides which, when treated with aldehydes and KOtBu, undergo a simultaneous Wittig olefination cum Dieckmann cyclisation to yield the respective 3-enoyltetramic acids.