Cesium carbonate → 3-(3-Bromo-5-chlorophenoxy)-4-methylpyridine-2-carbonitrile

HRID 1952349Notes

Reaction equation

F[C:2]1[C:3]([C:9]#[N:10])=[N:4][CH:5]=[CH:6][C:7]=1[CH3:8].[Br:11][C:12]1[CH:13]=[C:14]([OH:19])[CH:15]=[C:16]([Cl:18])[CH:17]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C>[Br:11][C:12]1[CH:13]=[C:14]([CH:15]=[C:16]([Cl:18])[CH:17]=1)[O:19][C:2]1[C:3]([C:9]#[N:10])=[N:4][CH:5]=[CH:6][C:7]=1[CH3:8]

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 3-fluoro-4-methylpyridine-2-carbonitrile (11-1; 2.1 g, 15.43 mmol), 3-bromo-5-chlorophenol (3.68 g, 17.74 mmol) and cesium carbonate (5.03 g, 15.43 mmol) in DMF (30 mL) was heated to 70° C. for 1 hour and then to 80° C. for 1 hour. After this time, the reaction mixture was partitioned between water (300 mL) and ethyl acetate (2×500 mL). The combined extracts were washed with water (100 mL) and then brine (100 mL), dried over MgSO4, filtered and the solvent removed in vacuo. The residue was chromatographed using a RediSep column (330 g) and eluted with a gradient of 0-10% EtOAc/CH2Cl2 and the pure fractions combined and concentrated on the rotary evaporator to give the title compound. LRMS (M+1)=324.9.

Workup

customAfter this time, the reaction mixture was partitioned between water (300 mL) and ethyl acetate (2×500 mL)
washThe combined extracts were washed with water (100 mL)
dry with materialbrine (100 mL), dried over MgSO4
filtrationfiltered
customthe solvent removed in vacuo
customThe residue was chromatographed
washeluted with a gradient of 0-10% EtOAc/CH2Cl2
concentrationconcentrated on the rotary evaporator

Sources & evidence

ORD record: ord-d16274119f9545c7adfe95a1925576e3
Source dataset: uspto-grants-2013_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08404856B2

Reaction notes

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