4-NITROBENZYL GROUP FOR PROTECTION OF HYDROXYL FUNCTIONS
Versatile use of 4-nitrobenzyl group for protection of hydroxyl functions is described.It can be removed selectively in the presence of other benzyl-type protecting groups such as benzyl and 4-methoxybenzyl via reduction into 4-aminobenzyl group followed by electrochemical oxidation.Very clean oxidative cleavage of 4-aminobenzyl group could also be effected with 2,3-dichloro-5,6-dicyanobenzoquinone after N-acetylation.