We herein report an efficient and systematic synthesis of 1-pyrrolines from cyclobutyl azides under thermal and neutral conditions. The reaction proceeded without any additional reagents, and nitrogen was generated as the sole by-product. Furthermore, the generated 1-pyrrolines could be continuously transformed into pyrroles, N-Boc-amines, and oxaziridines in an one-pot manner.
Transformation of cyclic ketimines to oxaziridines and nitrones
作者:Natalia G. Voznesenskaia、Olga I. Shmatova、Valentine G. Nenajdenko
DOI:10.1016/j.mencom.2017.01.008
日期:2017.1
Treatment of 5-, 6- and 7-membered cyclic ketimines bearing alkyl or aryl group with m-chloroperbenzoic acid proceeds as C=N epoxidation and affords bicyclic oxaziridines in good yields, whose subsequent rearrangement gives nitrones.