ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

New Heterocyclic Bridgehead Nitrogen Compounds Synthesis of 1-(p-Tosyl)pyrazolo[1,5-a]pyrimidines and Pyrazolo[5,1-c]-[1,2,4]-triazine Derivatives

M.M. Girges, M.A. Hanna, and A.A. Fadda

Department of Chemistry, aMansoura and bDamiatta Faculties of Science, Mansoura University, 355 16 Mansoura, Egypt

Abstract: Interaction of 3-amino-1,5-dihydro-1-(p-tosyl)pyrazole with ethyl acetoacetate, acrylonitrile and acetyl acetone afforded the corresponding 1-(p-tosyl)pyrazolo[1,5-a]pyrimidine derivatives. Diazotization of the starting compound and subsequent coupling with bifunctionally active nitriles yielded the corresponding pyrazolo[5,1-c]-[1,2,4]-triazine derivatives. IR and ¹H  NMR spectra for all of the hitherto prepared compounds are in good agreement with the proposed structures.

Full paper in Portable Document Format: 473a186.pdf

Chemical Papers 47 (3) 186–189 (1993)