Sodium hydride → tert-Butyl {[5-bromo-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl]methyl}methylcarbamate

HRID 1012428Notes

Reaction equation

HRID 1012428 reaction equation
[H-].[Na+].[C:3]([O:7][C:8](=[O:18])[N:9]([CH2:11][C:12]1[CH:16]=[C:15]([Br:17])[NH:14][CH:13]=1)[CH3:10])([CH3:6])([CH3:5])[CH3:4].C1OCCOCCOCCOCCOC1.Cl.[N:35]1[CH:40]=[CH:39][CH:38]=[C:37]([S:41](Cl)(=[O:43])=[O:42])[CH:36]=1>O1CCCC1.CN(C)C=O.O>[C:3]([O:7][C:8](=[O:18])[N:9]([CH2:11][C:12]1[CH:16]=[C:15]([Br:17])[N:14]([S:41]([C:37]2[CH:36]=[N:35][CH:40]=[CH:39][CH:38]=2)(=[O:43])=[O:42])[CH:13]=1)[CH3:10])([CH3:6])([CH3:4])[CH3:5]

Participants

8

Reactant 4

HCID 24758Sodium hydrideHCID 3633615-Crown-5HCID 12571517Pyridine-3-sulfonyl chloride hydrochlorideHCID 57522147tert-Butyl ((5-bromo-1H-pyrrol-3-yl)methyl)(methyl)carbamate

Product 1

HCID 57522258tert-Butyl {[5-bromo-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl]methyl}methylcarbamateYield 85.6%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a suspension (10 mL) of sodium hydride (60% in oil, 204 mg) in tetrahydrofuran was added a solution (3 mL) of tert-butyl[(5-bromo-1H-pyrrol-3-yl)methyl]methylcarbamate (410 mg) in N,N-dimethylformamide at 0° C., and 15-crown-5 (938 mg) and pyridin-3-ylsulfonyl chloride hydrochloride (456 mg) were added at the same temperature. After stirring at room temperature for 2 hr, water was added to the reaction mixture, 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. The residue was purified by silica gel column chromatography (eluent:hexane-ethyl acetate=8:1→3:1) to give the title compound as a pale-yellow powder (yield 522 mg, 85%).

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe extract was washed with saturated aqueous sodium hydrogencarbonate solution, water and saturated brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (eluent:hexane-ethyl acetate=8:1→3:1)

Sources & evidence

ORD record
ord-03a7f628cf554183854461fdf083ea39
Source dataset
uspto-grants-2011_07
Patent number
US07977488B2

Reaction notes

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