2,4‐O‐benzylidene‐D‐ribono‐1,5‐lactone: A revision of structure

Abstract
The main product resulting from the reaction of d‐ribonolactone with benzaldehyde dimethyl acetal is a 2,3‐O‐benzylidene derivative of the 1,4‐lactone, and not the 2,4‐O‐benzylidene analogue of the 1,5‐lactone, as suggested previously. Chemical and physical evidence supports the re‐assigned structure.