Hh. Abdel-razik et Aa. Fadda, Synthesis of 1-(p-tosyl)pyrazolo[1,5-a]-pyrimidines and pyrazolo [1,5-c]-[1,2,4]triazine derivatives, SYN COMMUN, 31(22), 2001, pp. 3547-3556
Several new pyrazolo[1,5-a]pyrimidines were synthesized by condensation of
3-amino-1,5-dihydro-1-(p-tosyl)pyrazole 2 with bifunctional reagents. Diazo
tization of 2 and subsequent coupling with beta -naphthol yielded the corre
sponding pyrazolo[1,5-c]-as-triazine derivatives. IR and H-1 NMR spectra fo
r all of the hitherto prepared compounds are in good agreement with the pro
posed structures.