反应详情

The mixture of 8 parts of 7-chloro-5-(o-chlorophenyl)-2,3-dihydro-1H-1,4-benzodiazepine, 4.9 parts of chloroacetylisocyanate, and 200 parts by volume of methylene chloride is stirred under nitrogen atmosphere at ambient temperature for about one hour. The mixture is then filtered through a layer of activated magnesium silicate and the filtrate evaporated to dryness. The resultant yellow oil is dissolved in ether and the solvent removed by evaporation to give gummy residue which upon crystallization from ether affords 7-chloro-N-chloracetyl-5-(o-chlorophenyl)-2,3-dihydro-1H-1,4-benzodiazepine-1-carboxamide, as a yellow solid melting at about 152°-156° C. This compound is represented by the following formula ##STR21##

1. filtrationThe mixture is then filtered through a layer of activated magnesium silicate
2. customthe filtrate evaporated to dryness
3. dissolutionThe resultant yellow oil is dissolved in ether
4. customthe solvent removed by evaporation
5. customto give gummy residue which
6. customupon crystallization from ether