Synthesis of Pyrazolone Derivatives. XVII. Synthesis of a Pyrazolo [3,4-c]-[1] benzoxepin and Pyrazolo [3,4-c] [1,5] benzoxazepines

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説明

The synthesis of two new type compounds which having the three ring systems, 1-methyl-2-phenyl-1,2,3,10-tetrahydro-4H-pyrazolo [3,4-c] [1] benzoxepin-3,4-dione (I), and 1-methyl-2-phenyl-1,2,3,10-tetrahydro-4H-pyrazolo [3,4-c] [1,5] benzoxazepin-3-one (II), consisting of the polyphosphoric acid cyclization or the Ullmann reaction of the appropriate pyrazolone derivatives, has been reported.

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