Preparation, Characterization, and Application of Polymer-Supported Stannols and Distannoxanes

Novel organotin copolymers derived from poly-3- and poly-4-(2-di-n-butylchlorostannyl)ethylstyrene-co-divinylbenzene-co-styrene have been prepared. The copolymers were prepared with various proportions of monomers and converted to organotin oxides and organotin carboxylates. Copolymer-bound organotin oxides, as a mixture of stannol and distannoxane, have been shown to catalyze the lactonization of hydroxycarboxylic acids.