Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Chemoselective deprotection of methyl esters can be achieved under non-hydrolytic and virtually neutral conditions by treatment with thiophenol in N-methyl-2-pyrrolidone (NMP) in the presence of a catalytic amount of K 2 CO 3 . ... Various substituted aryl and alkyl carboxylic acids, ...