Investigations on intramolecular 1,3-dipolar cycloadditions for the synthesis of isoxazolo-annulated pyrrolidines, piperidines and azepanes
作者:Martina Würdemann、Jens Christoffers
DOI:10.1016/j.tet.2014.05.042
日期:2014.8
Pyrrolidines, piperidines, and azepanes with annulated isoxazole, isoxazoline or isoxazolidine rings were prepared by intramolecular 1,3-dipolarcycloadditions of nitrones or nitrile oxides. The corresponding 1,3-dipoles were obtained from N-Boc-protected and N-allyl-, N-propargyl- or N-(3-butenyl)-substituted 2-aminoethanal or 3-aminopropanal.