1H and 13C NMR study of the pyrazolo [1, 5-a] pyrimidine system

S Chimichi, B Cosimelli, F Bruni…

Index: Chimichi; Cosimelli; Bruni; Selleri Canadian Journal of Chemistry, 1992 , vol. 70, # 4 p. 1093 - 1097

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Citation Number: 15

Abstract

The 13C and 1H NMR spectra of some pyrazolo [1, 5-a] pyrimidine derivatives are discussed. All 13C resonances were unambiguously assigned by means of both 2D experiments and gated decoupled spectra from which one-bond and long-range 13C-1H coupling constants were determined. The literature assignments for H-5 and H-7 in the parent system have been revised and a simple method for distinguishing between 5- ...