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

HRID 34385Notes

Reaction equation

HRID 34385 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[CH2:13][CH2:12][N:11]3[C:5]2=[C:6]([CH:26]=1)[C:7]([N:19]1[CH2:24][CH2:23][N:22]([CH3:25])[CH2:21][CH2:20]1)=[N:8][C:9]1[CH:17]=[C:16]([Br:18])[CH:15]=[CH:14][C:10]=13>C(Cl)(Cl)Cl.[O-2].[O-2].[Mn+4]>[Br:1][C:2]1[CH:3]=[C:4]2[CH:13]=[CH:12][N:11]3[C:5]2=[C:6]([CH:26]=1)[C:7]([N:19]1[CH2:20][CH2:21][N:22]([CH3:25])[CH2:23][CH2:24]1)=[N:8][C:9]1[CH:17]=[C:16]([Br:18])[CH:15]=[CH:14][C:10]=13

Participants

4

Reactant 1

HCID 138233094,9-Dibromo-6-(4-methyl-1-piperazinyl)-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]-benzodiazepine

Product 1

HCID 104125944,9-Dibromo-6-(4-methyl-1-piperazinyl)benzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine

Reagents, catalysts & solvents 2

HCID 178418406HCID 178418406, compoundCatalyst2×HCID 6212ChloroformSolvent

Procedure

A mixture 4,9-dibromo-6-(4-methyl-1-piperazinyl)-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]-benzodiazepine (4.5 g, 9.45 mmoles) and manganese(IV) dioxide (7.0 g) in chloroform (150 ml) was heated under reflux for 3.5 hours. An additional 4.5 g of manganese dioxide was added. The reaction mixture was stirred overnight at room temperature. The mixture was filtered through celite and the filtrate was concentrated. The residue was purified by flash chromatography over a silica gel column (140 gm , eluted with 2% methanol:98% dichloromethane (2 1). The appropriate fractions were collected and evaporated. Crystallization of the residue from isopropanol (10 ml) yielded

Workup

  1. temperatureunder reflux for 3.5 hours
  2. filtrationThe mixture was filtered through celite
  3. concentrationthe filtrate was concentrated
  4. customThe residue was purified by flash chromatography over a silica gel column (140 gm
  5. washeluted with 2% methanol
  6. customThe appropriate fractions were collected
  7. customevaporated
  8. customCrystallization of the residue from isopropanol (10 ml)
  9. customyielded

Sources & evidence

ORD record
ord-8fdff74375ca4dec9f58c678443278a9
Source dataset
uspto-grants-1988_08
Patent number
US04761412

Reaction notes

Loading…