Production of amino-functionalised condensed tannins via a single step conversion using supercritical fluid processing

Amphoteric aminophenol compounds have diverse synthetic and industrial use due to their multi-functional chemical reactivity. In this study, the synthesis of amphoteric flavonoid compounds via chemical modification with sub- and supercritical ammonia was explored. Both product formation and degree of amination of both catechin and condensed tannins were dependent on the processing conditions employed. Applying subcritical ammonia conditions...