Chemistry of L-ascorbic acid. Part 3. Photoreduction of quinones with 5,6-O-isopropylidene-L-ascorbic acid†

Abstract

Upon irradiation with UV light, instead of undergoing the Paternò–Büchi reaction, 5,6-O-isopropylidene-L-ascorbic acid reduced quinones quite efficiently and rapidly to the corresponding hydroquinones.