In 1974-1976, Mukaiyama and co-workers introduced a version of the Michael addition reaction wherein an enolsilane reacts with an enone under conditions of Lewis acid atalysis [1]. The conjugate addition of enolsilanes to α,β-unsaturated carbonyl derivatives, the Mukaiyama-Michael reaction has been shown to be a mild, versatile method for carboncarbon bond formation [2]. This process would provide access to valuable 1,5-dicarbonyl synthons which are important building blocks in organic synthesis. In our work addition of propiophenone enol silane to diethyl benziliden malonate and cinamoyl oxazolidinone using BF3.OEt2 as lewis acid gave product in good yield
