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Report | Regular issue | Vol 23, No. 7, 1985, pp.1675-1680
Published online, 1st January, 1970
DOI: 10.3987/R-1985-07-1675
Novel Ring Contraction of 4,6-Dihydro-3,7-diphenyl-5-(p-tosyl)-1,2,5-triazepine via a Chlorination

Kichinosuke Kamata and Otohiko Tsuge*

*Department of Applied Chemistry, Sojo University, 4-22-1, Ikeda, Kumamoto-shi, 860-0082, Japan

Abstract

In the chlorination 4,6-dihydro-3,7-diphenyl-5-(p-tosyl)-1,2,5-triazepine undergoes a novel ring contraction in methanol to afford pyrrolidines and morpholines which are arisen from the extrusion of nitrogen, in contrast to the formation of the 4-(p-tosylamino)pyridazine and/or 4,6-dichlorodihydrotriazepine in an aprotic solvent.