Ammonium Acetate → 5-bromo-2-(5-{1-[4-(methylsulfonyl)phenyl]-2-(tetrahydro-2H-pyran-4-yl)ethyl}-1H-pyrrol-2-yl)pyridine

HRID 1881992Notes

Reaction equation

[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:8](=O)[CH2:9][CH2:10][C:11](=O)[CH:12]([C:20]2[CH:25]=[CH:24][C:23]([S:26]([CH3:29])(=[O:28])=[O:27])=[CH:22][CH:21]=2)[CH2:13][CH:14]2[CH2:19][CH2:18][O:17][CH2:16][CH2:15]2)=[N:6][CH:7]=1.C([O-])(=O)C.[NH4+:36]>C(O)(=O)C.C(OCC)(=O)C>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[NH:36][C:11]([CH:12]([C:20]3[CH:25]=[CH:24][C:23]([S:26]([CH3:29])(=[O:28])=[O:27])=[CH:22][CH:21]=3)[CH2:13][CH:14]3[CH2:19][CH2:18][O:17][CH2:16][CH2:15]3)=[CH:10][CH:9]=2)=[N:6][CH:7]=1

Participants

Conditions

Temperature: 110 °C

Procedure

To a solution of 1-(5-bromopyridin-2-yl)-5-[4-(methylsulfonyl)phenyl]-6-(tetrahydro-2H-pyran-4-yl)hexane-1,4-dione (3.89 g) in acetic acid (40 mL) was added ammonium acetate (9.50 g), and the mixture was stirred at 110° C. for 45 min. After cooling to room temperature, the reaction mixture was diluted with ethyl acetate and washed with water. The ethyl acetate layer was washed with saturated aqueous sodium hydrogen carbonate and saturated brine, dried (MgSO4) and concentrated. The residue was subjected to silica gel column chromatography, and the title compound (3.20 g, yield 86%) was obtained as a colorless amorphous solid from a fraction eluted with ethyl acetate-hexane (1:1, volume ratio). MS: 491 (MH+).

Workup

temperatureAfter cooling to room temperature
washwashed with water
washThe ethyl acetate layer was washed with saturated aqueous sodium hydrogen carbonate and saturated brine
dry with materialdried (MgSO4)
concentrationconcentrated

Sources & evidence

ORD record: ord-44591b91d7494dae920f23f6fc2cd6ec
Source dataset: uspto-grants-2012_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08318746B2

Reaction notes

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