(CHa) zCd R'CH2COCH3 t--R'CH2COCl (XVII)(XIII) respectively, was achieved in yields approximating those obtained in such reactions with purely organic P-ketoesters. Formation of these ketones through the use of 10% alkali or concd. hydrochloric acid, and the normal reactions of IX with sodium hypobromite and methylmagnesium bromide, clearly show that these compounds in which the keto group is linked to carbon gamma to silicon are fur ...