An improved method for the introduction of carbon-carbon triple bond at C-13 in PG synthesis

Abstract An improved method for the introduction of carbon-carbon triple bond at C-13 in PG-synthesis is described. The efficient aldol reaction of aldehydes has been achieved by using α-chloro enolate anions derived from 1-bromo-1-chloro ketones, giving α-chloro enones after dehydration in good yields, the precursor of the acetylenic alcohols.