Two new “one pot” double alkylation reactions, 1) allylation of α,β-enones with allylsilanes and subsequent reaction with electrophiles, and 2) acylation of α-siloxyallylsilanes with acid halides followed by consecutive introduction of other electrophiles on the neighboring carbon atom, are reported.
A new modification of Peterson reaction leading to elongation of three carbon units by treatment of aldehydes with titanium ate complex, prepared from 1-lithio-1-(1-alkoxy)allyltrimethylsilane and titanium(IV) isopropoxide, is described.