A new allylidene phosphorane reagent for the efficient conversion of aldehydes to gamma,delta-unsaturated allyl beta-ketoesters

摘要

A new Wittig reagent 4 has been synthesized and its reaction with various aldehydes afforded the corresponding dienol ethers in fair to good yields. Subsequent acid-catalyzed hydrolysis provided gamma,delta -unsaturated allyl beta -ketoesters 1. [References: 8]