Ammonia → 4'-Chloro-2-hydroxy-4-methoxy-benzophenone imine
Reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=O)[C:9]2[CH:14]=[CH:13][C:12]([O:15][CH3:16])=[CH:11][C:10]=2[OH:17])=[CH:4][CH:3]=1.[NH3:19]>CO>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=[NH:19])[C:9]2[CH:14]=[CH:13][C:12]([O:15][CH3:16])=[CH:11][C:10]=2[OH:17])=[CH:4][CH:3]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A suspension of 132 g. of 4'-chloro-2-hydroxy-4-methoxy-benzophenone in 500 ml. of methanol is cooled to -20° C. in a 2 l. shaking autoclave and treated with 120 ml. of liquid ammonia. The mixture is then shaken at 120° C. for 20 hours under a nitrogen atmosphere. After cooling, the yellow crude product is filtered off under suction and washed with a small amount of methanol. There is obtained 4'-chloro-2-hydroxy-4-methoxy-benzophenone imine, having a melting point of 210°-212° C., which can be used in the next step without further purification. An analytical sample is obtained by recrystallization from methanol and has a melting point of 212°-214° C.