The p-toluenesulfonate group (tosyl group) is widely used as a leaving group in elimination or substitution reactions. Conditions to recover the alcohol are most of the time drastic and thus limit its use as a protecting group. Among the different methods already published to perform such a deprotection, 1 the use of sodium amalgam, 2 low valent titanium, 3 Na-naphthalenide 4 or magnesium in methanol 5 have been reported. Microwave assisted conditions 6 or ...
