Origin of the substance
A method for the synthesis of diazepam has been described (Sternbach et al, 1961). Benzoyl chloride reacts with p-chloroaniline to produce 2-amino-5-chlorobenzophenone. This is converted to the oxime with hydroxylamine. After cyclization with chloroacetyl chloride and ring enlargement with alkali treatment, 7-chloro-1,3-dihydro-5-phenyl-2H-1,4-benzodiazepin-2-one-oxide is reduced and methylated to diazepam.
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