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Process for the preparation of furo(3,4-e)-as-triazines
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, (2008/06/13)
5,5,7,7-tetramethyl-3-substituted or unsubstituted-phenylfuro[3,4-e]-as-triazines, e.g., 5,7-dihydro-5,5,7,7-tetramethyl-3-(m-nitrophenyl)furo[3,4-e]-as-triazine, are prepared by reacting a 2,2,5,5-tetramethyl-3,4(2H,5H)furandione with substituted or unsubstituted benzimidic acid hydrazide under an inert atmosphere in the presence of an inert organic solvent and are useful as sleep inducers and minor tranquilizers.