Ammonia → 2H-1,4-Benzodiazepin-2-one, 5-(2-fluorophenyl)-1,3-dihydro-7-(hydroxyamino)-1-methyl-

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Reaction Steps

A mixture of 16 g. (0.05 mol) of 1,3-dihydro-5-(2-fluorophenyl)-1-methyl-7-nitro-2H-1,4-benzodiazepin-2-one, 500 ml. of tetrahydrofuran, 250 ml. of methanol, 68 g. of sodium acetate trihydrate and 56 g. of stannous chloride dihydrate was stirred under nitrogen for 6 hours. 25 ml. of concentrated ammonia was added and the inorganic salts were removed by filtration through celite. The filtrate was washed well with 2 l. of tetrahydrofuran. The filtrate was evaporated and the solid residue was dissolved in ethanol/tetrahydrofuran. The solution was again filtered with celite and concentrated. The separated crystals were collected to leave light yellow product. For analysis it was recrystallized from ethanol/tetrahydrofuran, m.p. 228°-230° dec.

Provenance & Evidence