The rhodium catalyzed isomerization of α-, β-, and γ-silylated allylalcohols has been successfully applied to the selective synthesis of acylsilane, α-silyl ketones, and β-silyl ketones, respectively.
The isomerization of an α-trimethylsilyl ketone is lead to the corresponding trimethylsilyl enolether with the enhanced regioselectivity by heating or by the assist of trimethylsilyl trifluoromethanesulfonate. The thermal reaction discloses a new regiodefined (E)-selective route to silyl enolethers.
Regiodefined synthesis of α-bromo, α-phenylthio, and α-phenylseleno ketones by means of specific substitution of the trimethylsilyl group in α-trimethylsilyl ketones