The solid phase synthesis of tertiary hydroxyesters from symmetrical diacid chlorides using organomanganese reagents

Abstract

A 1% crosslinked divinylbenzene–styrene copolymer, incorporating benzyl alcohol groups, was used to monoblock the symmetrical diacid chlorides, ClOC(CH₂)_nCOCl (where n = 4 and 8). Further reaction of the polymer-bound monoester monoacid chloride with phenylmanganese iodide or butylmanganese iodide gave their respective polymer-bound tertiary hydroxyesters. Subsequent base cleavage and esterification yielded methyl 6-hydroxy-6, 6-diphenylhexanoate, methyl 10-hydroxy-10,10-diphenyldecanoate, methyl 6-butyl-6-hydroxydecanoate, and methyl 10-butyl-10-hydroxytetradecanoate and some recovered dimethyl alkanoates. The reactions of some polymer-bound monoester monoacid chlorides with phenylcadmium chloride were also studied.