Isopropanol → Nordiazepam

Beteiligte Stoffe

Reaktionsschritte

Reflux 1.76 g. (0.005 moles) of 2-(2-bromoacetamido)-5-chlorobenzophenone, 2.80 g. (0.02 moles) of hexamethylenetetramine and 1.96 g. (0.020 moles) of ammonium bromide in 14 ml. of 85% (v/v) aqueous isopropyl alcohol for 2 hours. Pour the reaction mixture into water and extract with benzene. Dry the benzene solution over anhydrous sodium sulfate. Filter and evaporate to dryness. After recrystallization, 7-chloro-1,3-dihydro-5-phenyl-2H-1,4-benzodiazepin-2-one is obtained. In thin layer chromatography the product shows a single spot (silica gel GF plates, benzene-ethyl acetate-acetic acid=18:3:1), m.p. 213°-215° C.

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