Aa. Geies, SYNTHESIS OF THIENO[2',3' 4,5]PYRIMIDO[2,1-C][1,2,4]TRIAZOLES AND PYRAZOLYLTHIENO[2,3-D][4,5-D']DIPYRIMIDINES/, Journal of chemical research. Synopses (Print), (6), 1998, pp. 290
6-Substituted 5-amino-2-hydrazino-4-phenylthieno[2,3-d] pyrimidines (2
a-c) were synthesized and used as key intermediates for the synthesis
of new thienopyrimidotriazoles and pyrazolylthienodipyrimidines.