Ammonia → 3-fluoro-5-o-fluorophenyl-7-nitro-2,3-dihydro-1H-1,4-benzodiazepin-2-one

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Reaction Steps

NH3 is passed into a refluxing solution of 1.48 g. of hexamethylenetetramine in 30 ml. of ethanol; 3.83 g. of 2-(α-bromo-α-fluoroacetamido)-5-nitro-2'-fluorobenzophenone, obtainable from 2-amino-5-nitro-2'-fluorobenzophenone and α-bromo-α-fluoroacetyl bromide, are added over 2 hours. The mixture is then heated under reflux for 3 hours more and is evaporated. The resulting 2-(α-amino-α-fluoroacetamido)-5-nitro-2'-fluorobenzophenone is treated with 15 ml. of toluene and 20 mg. of p-tolunesulfonic acid and is heated under reflux for 1 hour. Working up in the customary manner gives 3-fluoro-5-o-fluorophenyl-7-nitro-2,3-dihydro-1H-1,4-benzodiazepin-2-one.

Provenance & Evidence