The reactions of a variety of ester and lactone enolates with methyldiphenylchlorosilane were studied. The C-versus 0-silylation, leading to the a-silyl ester or lactone and silyl ketene acetal, respectively, was studied as a function of the structure of the ester or lactone and the reaction conditions. It was found that all simple acetates are C-silylated irrespective of the steric demands of the alcohol portion of the ester. Esters that are monosubstituted in ...
![ethyl 2-[methyl(diphenyl)silyl]undec-10-enoate Structure](https://image.chemsrc.com/caspic/376/89968-59-2.png)