An unusual ring closure reaction with formation of pyrrolidin-2,5-dione derivatives
作者:Vladimir I. Minkin、Eugeny P. Ivachnenko、Alexander I. Shif、Lew P. Olekhnovitch、Olga E. Kompan、Alexander I. Yanovskii、Yurii T. Struchkov
DOI:10.1039/c39880000990
日期:——
Mild oxidation of amidine (1) bearing two sterically crowded phenol moieties leads to the formation of the dispirocyclohexadienone derivative (6) of pyrrolidin-2,5-dione N-arylamine through an intramolecular ringclosure recombination of the intermediate biradical (4).