86014-18-8

Diethyl[dimethyl(phenyl)silyl]aluminum can silylaluminate terminal alkynes;can cross couple with alkenyl, allyl, and aryl phosphates;can deoxygenate epoxides.
The reagent adds to 1-alkynes in a regio- and stereoselective (cis addition) manner. Transition metal catalysts alter the regioselectivity (eq 1).

prepared in situ by adding PhMe2SiLi in THF to a hexane solution of Et2AlCl at 0°C.