Methanamine, hydrochloride (1:1) → 1-[5-bromo-1-(phenylsulfonyl)-1H-pyrrol-3-yl]-N-methylmethanamine

HRID 2196926Notes

Reaction equation

HRID 2196926 reaction equation
[Br:1][C:2]1[N:6]([S:7]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)(=[O:9])=[O:8])[CH:5]=[C:4]([CH:16]=O)[CH:3]=1.[Cl-].C[NH3+].[C:21]([BH3-])#[N:22].[Na+]>CO>[Br:1][C:2]1[N:6]([S:7]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)(=[O:9])=[O:8])[CH:5]=[C:4]([CH2:16][NH:22][CH3:21])[CH:3]=1

Participants

5

Reactant 3

HCID 11637Methanamine, hydrochloride (1:1)HCID 5003444Sodium cyanoborohydrideHCID 862328055-Bromo-1-(phenylsulfonyl)-1H-pyrrole-3-carbaldehyde

Product 1

HCID 669246631-[5-bromo-1-(phenylsulfonyl)-1H-pyrrol-3-yl]-N-methylmethanamineYield 120%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution (60 mL) of 5-bromo-1-(phenylsulfonyl)-1H-pyrrole-3-carbaldehyde (3.5 g) in methanol were added methylammonium chloride (7.5 g) and sodium cyanoborohydride (2.4 g), and the mixture was stirred at room temperature for 1 hr. The reaction mixture was concentrated under reduced pressure, saturated aqueous sodium hydrogencarbonate solution was added to the residue, and the mixture was extracted with ethyl acetate. The extract was washed with saturated aqueous sodium hydrogencarbonate solution, water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give the title compound as a brown oil (yield 4.4 g, about 100%).

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure, saturated aqueous sodium hydrogencarbonate solution
  2. additionwas added to the residue
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe extract was washed with saturated aqueous sodium hydrogencarbonate solution, water and saturated brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-7a4484b3572745b49c206fc0907ccd4b
Source dataset
uspto-grants-2012_12
Patent number
US08338461B2

Reaction notes

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