Synthese de cetones aliphatiques encombrees : Action des organolithiens sur les dimethyl-4,4 oxazolines-2. Addition des organometalliques sur les sels de dimethyl-4,4 oxazolinium-2

α,α-Disubstituted ketones result from the reaction of organolithium compounds with substituted 4,4-dimethyl-2-oxazolines, 4, after hydrolysis of the intermediate enamine. Alkylation of the latter also permits the synthesis of α,α,α-trisubstituted ketones. α,α-Disubstituted ketones have been prepared by addition of organometallic reagents to 4,4-dimethyl-2-oxazolinium salts, 6. The efficiency of this method has been compared to that of other currently used methods.