An efficient and convergent synthetic route to a $-unsaturated acylsilanes has been developed based on the Hornel-Wadsworth-Emmons reaction of (a-phosphonoacy1) silanes. The Arbuzov reaction of the (a-iodoacy1) silane IC with trimethyl phosphite provides access to the phosphonate 2, which can be alkylated by treatment with potassium tert- butoxide and methyl iodide to afford 3. These (a-phosphonoacy1) silane reagents ...
