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Abstract
Our reports1,2 on the preparation, cleavage, and the facile transesterification and aminolysis of methylthiomethyl (MTM) esters have apparently aroused interests in the general use of the MTM group for protection of hydroxy functions.3,4 A recent note5 describing an alternative path to and hydrolysis of MTM esters prompts me to disclose a truly mild method for MTM ester synthesis. The procedure of Wade et al.5 is in fact less convenient than that of our original work, with respect to both the esterification and the hydrolysis steps.