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. ... NH pyrrolidines are obtained from intermolecular 3+2 cycloaddition reactions between nonactivated olefins and ylide generated from amine N-oxide structurally designed in such a way as to allow easy dealkylation of the cycloadduct. ... Protection of the hydroxyl group appeared ...