4-Bromobutyryl chloride → 8-Chloro-5-(4-diethylamino-butyryl)-5,10-dihydro-11H-dibenzo(b,e)(1,4)-diazepine-11-one

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The 5-(5-bromobutyryl)-8-chloro-5,10-dihydro-11H-dibenzo(b,e)(1,4)-diazepine-11-one, used as starting material, is synthesized similarly to the starting material described in Example 1 from 8-chloro-5,10-dihydro-11H-dibenzo(b,e)(1,4)-diazepine-11-one and 4-bromobutyryl chloride. The yield is 83.1% of the theoretical yield and the melting point is 176°-177° C.

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