33 80: R1= R2= H 8 2 b: R1= CH3; R2= H 50 C: R1= H; R*-CH3 70 d: R,= Rp-CH, to the desired tetrazolo [l, 5-b][1, 2, 4] triazines. However, the yields for this reaction are not high, and the synthesis of the required 3-hydrazino-l, 2, 4-triazines is a multistep synthesis involving unpleasant sulfur compounds. We therefore chose to examine an alternate synthesis of the tetrazolo [1,541 [1, 2, 4] triazines based on the reaction of 1, 5- ...