Pyrazine derivatives R 0550
One-Pot Synthesis of 7-Bromo-1-[4-(1-cyano-1-methylethyl)]-phenyl-[1,2,4]-triazole-[4,3-a]-quinoxalin.-The preparation of (III) represents an efficient approach to the class of tricyclic nonxanthine adenosine antagonists. -(YANG, Y.; HU, H. G.; ZHAO, Q.