KECEIVED JUNE 2, 1953 illdo1 type Condensation between various ketones and esters can be effected by means of diethylaminomagnesium bromide and some related amiiioniagiiesium bromides as well as mesitylmagnesium bromide. When at1 equimolar mixture of benzophenone and t-butyl acetate was treated with an excess of diethylaminomagnesium bromide in ether, t-butyl@,@-diphenylhydracrylate was obtdined ...