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The synthesis of [1,2,4] Results and DiscussionThe requisite starting [1,2,4]triazin-5(4H)-ones 1 -4 and hydrazonoyl halides 6 for this study were prepared by previ-PROCEDURES/DATA _________________________________________________________________ 96

A New One-Step Synthesis of Pyrimido[1,2-b][1,2,4,5]tetrazines -[via reaction of 3-amino-2-mercaptopyrimidinone (I) with hydrazonoyl halides (II) (9 examples)]. -(SHAWALI, AHMAD S.; ELGHANDOUR, AHMAD A.; EL-SHEIKH, SAID M.; Heteroat. Chem. 11 (2000) 2, 87-90; Dep. Chem., Cairo Univ., Giza, Egypt; EN)