Water → 4-Methyl-1-(phenylsulfonyl)-5-(3-thienyl)-1H-pyrrole-3-carbaldehyde

HRID 554348Notes

Reaction equation

Br[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:17])[C:3]=1[CH3:18].[S:19]1[CH:23]=[CH:22][C:21](B(O)O)=[CH:20]1.C(=O)([O-])[O-].[Na+].[Na+].O>COCCOC>[CH3:18][C:3]1[C:4]([CH:16]=[O:17])=[CH:5][N:6]([S:7]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)(=[O:9])=[O:8])[C:2]=1[C:21]1[CH:22]=[CH:23][S:19][CH:20]=1

Participants

Conditions

Temperature: 100 °C

Procedure

Under an argon atmosphere, a suspension of 5-bromo-4-methyl-1-(phenylsulfonyl)-1H-pyrrole-3-carbaldehyde (656 mg), 3-thiopheneboronic acid (511 mg), dichloro[bis(triphenylphosphine)]palladium (70 mg) and sodium carbonate (636 mg) in 1,2-dimethoxyethane (10 mL)-water (3 mL) was stirred at 100° C. for 2 hr. After cooling, the reaction mixture was filtered through celite, and celite was washed with ethyl acetate. The organic layer was separated from the filtrate, washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1→7:3) to give the title compound as a colorless oil (yield 549 mg, 83%).

Workup

temperatureAfter cooling
filtrationthe reaction mixture was filtered through celite, and celite
washwas washed with ethyl acetate
customThe organic layer was separated from the filtrate
washwashed with water and saturated brine
dry with materialdried over anhydrous magnesium sulfate
concentrationconcentrated under reduced pressure
customThe residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1→7:3)

Sources & evidence

ORD record: ord-a11bc7b0cf1742119bd81d07e054d4d9
Source dataset: uspto-grants-2011_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08048909B2

Reaction notes

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