Azinoiminophosphorane Mediated 4H,8H-1,2,4-Triazolo[1,5-c][1,3]oxazepin-4-ones and 5,6-Dihydro-7H,12H-naphtho[2,1-f][1,2,4]triazolo[1,5-c] [1,3]oxazepin-7-ones Synthesis.

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