Direct Michael Additions of Silyl Groups to α,β‐Unsaturated β‐Arylketones and an α‐Benzylidenelactone with Mixtures Obtained from Copper( I ) Cyanide, Butyllithium and Chlorosilanes

A considerable simplification of the Michael addition of silyl groups to enones of type 1 was accomplished with the quoted mixture of reagents. The products of type 2 were formed in good yields. 5-Benzylidene-2-tert-butyl-6-methyl-1,3-dioxan-4-one or open-chain enones with R1 = H, R2 = alkyl or aryl have thus far been employed as 1.