Bis(trimethylsiloxy)-1,1 butadiene-1,3 et trimethylsilyl-4 butene-2 oate de trimethylsilyle: preparations et reactions avec benzaldehyde

Article abstract of DOI:10.1016/0022-328X(88)80497-2

The preparation of 4-trimethylsilyl-2-butenoate trimethylsilyl ester and 1,1-bis(trimethylsiloxy)-1,3-butadiene are described.The latter silyl derivative reacts with benzaldehyde in the presence of ZnBr2 in THF to give exclusively γ-substituted product (E configuration) in high yield.The fluoride ion catalyzed reaction affords predominantly α-alkylated compounds.