Catalytic transfer hydrogenation acids affected

Formic acid can be used as the hydrogen source in catalytic transfer hydro-genolyses of N-benzyloxycarbonyl and benzyl ester groups. Although the acid concentration can be kept low enough not to affect acid-labile functions e.g. N-BOC), perhaps in view of previous work (3, 354) this method could be best employed in the simultaneous removal of benzyl and t-butyl groups ... 

Carbonaceous deposits result from the transformation of reactants, reaction products, impurities of the feed, etc., on acid sites through various successive bimolecular steps condensation, hydrogen transfer, etc. Therefore, their rate of formation depends on the following parameters which usually affect the rate of catalytic reactions, namely ... 

---