Reactions of Dianions of Acyclic β-Enamino Ketones with Electrophiles. Part.8 . Synthesis of Triakylsilylenaminones and alfa’-Silylated beta-Diketones

alpha'- and gamma-Dianions of beta-(monoalkylamino) alpha,beta-unsaturated ketones react with trialkylchlorosilanes leading to alpha'- and gamma-trialkylsilylenaminones. Conversely from trimethylchlorosilane, the reaction between dianions of 3-(N-isopropylamino)-1-arylbut-2-en-1-ones and t-butyldimethylchlorosilane or triisopropylchlorosilane leads to the corresponding 4-trialkylsilyl derivatives. An explanation of these findings is reported. Hydrolysis of these compounds affords the until now unknown alpha' silylated beta-diketones.