Alkylation of the pyrrolidine enamines of several cyclohexanones with 3-bromopropyl acetate gives the corresponding 2-(3'-acetoxypropyl) cyclohexanones. These keto esters are hydrolyzed to keto alcohols which are cyclized and dehydrated to tetrahydrochromans. Alkylation of pyrrolidinocyclohexene or pyrrolidinocycloheptene with 4-bromobutyl acetate gives the corresponding 2-(4'-acetoxybutyl) cycloalkanone which is converted similarly ...
