Réaction #4186

Équation de réaction

N-bromosuccinimide

6-(4-methyl-1-piperazinyl)-9-methyl-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine

dichloromethane

→

product

Rendement 11.6%

10-Bromo-9-methyl-6-(4-methyl-1-piperazinyl)-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine

Rendement 11.6%

Solvants

dimethylformamide

dimethylformamide

Conditions de réaction

Traitement

1. 1
   Lavagewas washed with brine (4 times, 150 ml)
2. 2
   Séchagedried over anhydrous magnesium sulfate
3. 3
   AutreThe solvent was removed at reduced pressure
4. 4
   Autrethe residue was dried
5. 5
   AutrePurification
6. 6
   Lavageeluted with dichloromethane (500 ml) and 2% methanol in dichloromethane (250 ml)
7. 7
   workup.ADDITIONThe fractions containing the product
8. 8
   Concentrationconcentrated
9. 9
   AutreRecrystallization from 2-propanol:water (1:1, 20 ml)

Mode opératoire

A solution of N-bromosuccinimide (0.91 g, 5.1 mmoles) in dimethylformamide (3 ml) was added dropwise to a solution of 6-(4-methyl-1-piperazinyl)-9-methyl-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine (1.6 g, 4.8 mmoles) in dimethylformamide (30 ml) at 0°-3° C. The reaction mixture was stirred for 30 minutes. The solution was poured into dichloromethane (250 ml), and was washed with brine (4 times, 150 ml), and dried over anhydrous magnesium sulfate. The solvent was removed at reduced pressure and the residue was dried. Purification was accomplished by flash chromatography on an aluminium oxide column (grade III, 60 g), eluted with dichloromethane (500 ml) and 2% methanol in dichloromethane (250 ml). The fractions containing the product were pooled and concentrated. Recrystallization from 2-propanol:water (1:1, 20 ml) yielded 230 mg (11.6%) of product, mp 177°-177° C.

Source