Download 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. ... An efficient hydration reaction of various (hetero)aryl nitriles using Cs 2 CO 3 in pyrrolidinone is described. This new metal-free protocol proved to be highly effective and general to synthesize a variety of (hetero)aryl amides. ... Various (hetero)aryl amides were efficiently prepared ...