Water → 9-Bromo-5-methyl-4-oxo-3-phenyl-3,5-dihydro-4H-pyridazino[4,5-b]indole-1-acetonitrile

HRID 1384820Notes

Reaction equation

HRID 1384820 reaction equation
[Br:1][C:2]1[C:3]2[C:4]3[C:15]([CH2:16]Br)=[N:14][N:13]([C:18]4[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=4)[C:12](=[O:24])[C:5]=3[N:6]([CH3:11])[C:7]=2[CH:8]=[CH:9][CH:10]=1.[C-:25]#[N:26].[Na+].O>[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.ClCCl>[Br:1][C:2]1[C:3]2[C:4]3[C:15]([CH2:16][C:25]#[N:26])=[N:14][N:13]([C:18]4[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=4)[C:12](=[O:24])[C:5]=3[N:6]([CH3:11])[C:7]=2[CH:8]=[CH:9][CH:10]=1

Participants

6

Reactant 3

HCID 962WaterHCID 8929Sodium CyanideHCID 211837479-Bromo-1-(bromomethyl)-5-methyl-3-phenyl-3,5-dihydro-4H-pyridazino[4,5-b]indol-4-one

Product 1

HCID 211837399-Bromo-5-methyl-4-oxo-3-phenyl-3,5-dihydro-4H-pyridazino[4,5-b]indole-1-acetonitrileYield 99.3%

Reagents, catalysts & solvents 2

HCID 74236Tetrabutylammonium BromideCatalystHCID 6344DichloromethaneSolvent

Procedure

A solution of 6.4 g (14.3 mmol) of 9-bromo-1-(bromomethyl)-5-methyl-3-phenyl-3,5-dihydro-4H-pyridazino[4,5-b]indol-4-one, of 3.6 g (73 mmol) of sodium cyanide and of 0.57 g (1 mmol) of tetrabutylammonium bromide in a mixture of 170 ml of dichloromethane and of 85 ml of water is heated at reflux for 3 h with mechanical stirring. Separation is carried out by settling and the reaction mixture is extracted with dichloromethane. The organic phase is washed with water and dried over sodium sulphate and the solvent is evaporated under reduced pressure. 5.6 g (14.2 mmol) of product are obtained, which product is used as is in the following stage.

Workup

  1. temperatureat reflux for 3 h with mechanical stirring
  2. customSeparation
  3. extractionthe reaction mixture is extracted with dichloromethane
  4. washThe organic phase is washed with water
  5. dry with materialdried over sodium sulphate
  6. customthe solvent is evaporated under reduced pressure

Sources & evidence

ORD record
ord-3883ee2d14b84014aee42e05a8dd198d
Source dataset
uspto-grants-2001_07
Patent number
US06262045B1

Reaction notes

Loading…