The efficient copper-catalyzed cyanoalkylation of amines via C–Cbondcleavage has been demonstrated. Distinctive features of this procedure involves mild conditions, broad range of nitrogen nucleophiles, high selectivity, and good functional group tolerance, thus providing a useful approach for the C(sp3)–N bond formations. Most importantly, this protocol is applicable to the late-stage functionalization
Microwave-assisted cyclizations promoted by polyphosphoric acid esters: a general method for 1-aryl-2-iminoazacycloalkanes
作者:Jimena E Díaz、María C Mollo、Liliana R Orelli
DOI:10.3762/bjoc.12.190
日期:——
omega-arylaminonitriles promoted by polyphosphoricacid (PPA) esters. 1-Aryl-2-iminopyrrolidines were easily prepared from the acyclic precursors employing a chloroformic solution of ethyl polyphosphate (PPE). The use of trimethylsilyl polyphosphate (PPSE) in solvent-free conditions allowed for the synthesis of 1-aryl-2-iminopiperidines and hitherto unreported 1-aryl-2-iminoazepanes. The cyclization reaction involves