Allyl and cinnamyl esters could be chemoselectively deprotected by kaolinitic clay (Table 19, entry 1)166 and Envirocat EPZG (Scheme 11). Upon heating the esters at reflux in toluene in the presence of anisole as nucleophile, both catalysts promoted the conver- sion to the parent acids with identical results. The catalyst activity was attributed to Brønsted and Lewis acid centers present on their surface