Abstract
Analysis of the electron impact mass spectra, collision-induced dissociation spectra, and high-resolution mass spectrometry data of N -[2-(cyclopent-1-en-1-yl)phenyl]arylamides and isomeric 2-arylspiro[3,1-benzoxazine-4,1'-cyclopentanes] indicated that only a small portion of the molecular ions of the arylamides undergo cyclization to give the corresponding substituted 3,1-benzoxazines prior fragmentation. The donor-acceptor properties of the benzene ring substituents affect the efficiency of cyclization of the molecular ions. Authors: E. G. Galkin, A. S. Erastov, E. M. Vyrypaev, I. I. Furlei, I. B. Abdrakhmanov, Sh. M. Salikhov, and S. A. Kras'ko. English Translation in Chemistry of Heterocyclic Compounds , 2013, 49 (7), pp 1082-1086 http://link.springer.com/article/10.1007/s10593-013-1346-6
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