Triethylamine → 2-[5-(4-Bromo-3-formyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 1185627Notes

Reaction equation

HRID 1185627 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]1[NH:14][C:15]([C:18]2[CH:23]=[CH:22][C:21]([Br:24])=[C:20]([CH2:25][OH:26])[CH:19]=2)=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.C1C=CN=CC=1.O=S(=O)=O>CS(C)=O>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]1[NH:14][C:15]([C:18]2[CH:23]=[CH:22][C:21]([Br:24])=[C:20]([CH:25]=[O:26])[CH:19]=2)=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 168533Sulfur trioxide-pyridineHCID 666206222-[5-(4-bromo-3-hydroxymethyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 723383572-[5-(4-Bromo-3-formyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl esterYield 93.1%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

To the solution of 2-[5-(4-bromo-3-hydroxymethyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (196 mg, 0.46 mmol) in DMSO (3.5 ml) was added triethylamine (0.40 ml). The mixture was stirred for 30 minutes, and pyridine-sulfur trioxide (500 mg) was added. The mixture was stirred for 2 hours and was quenched with ice-water. The stirring was continued for additional 30 minutes and the mixture was extracted with EtOAc. The organic phase was washed with water and brine, and was dried with sodium sulfate. Concentration gave 2-[5-(4-Bromo-3-formyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (180 mg).

Workup

  1. stirringThe mixture was stirred for 2 hours
  2. customwas quenched with ice-water
  3. waitThe stirring was continued for additional 30 minutes
  4. extractionthe mixture was extracted with EtOAc
  5. washThe organic phase was washed with water and brine
  6. dry with materialwas dried with sodium sulfate
  7. concentrationConcentration

Sources & evidence

ORD record
ord-e21340c1f26d48618047b2de2aba80df
Source dataset
uspto-grants-2014_03
Patent number
US08669234B2

Reaction notes

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