Ethyl Acetate → 3-bromo-4-[(2,4-difluorobenzyl)oxy]-1-(2-furylmethyl)-6-methylpyridin-2(1H)-one

HRID 1832076Notes

Reaction equation

[Br:1][C:2]1[C:3](=[O:19])[NH:4][C:5]([CH3:18])=[CH:6][C:7]=1[O:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([F:16])=[CH:12][C:11]=1[F:17].[H-].[Na+].Cl[CH2:23][C:24]1[O:25][CH:26]=[CH:27][CH:28]=1.C(OCC)(=O)C>C1COCC1.C(#N)C.O.O>[Br:1][C:2]1[C:3](=[O:19])[N:4]([CH2:23][C:24]2[O:25][CH:26]=[CH:27][CH:28]=2)[C:5]([CH3:18])=[CH:6][C:7]=1[O:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([F:16])=[CH:12][C:11]=1[F:17]

Participants

Conditions

Temperature: 68 °C

Procedure

To a room temperature suspension of 3-bromo-4-[(2,4-difluorobenzyl)oxy]-6-methylpyridin-2(1H)-one (330.0 mg, 1.00 mmol)) and NaH (48.0 mg, 2.0 mmol) in THF (3.0 mL) was added 2-(chloromethyl)furan (461 mg, 3.97 mmol). The resulting suspension was stirred and heated to 68° C. for 9 hours until complete consumption of starting material by LCMS analysis. The reaction mixture was then diluted with-ethyl acetate (400 mL), water washed (3×200 mL). The resulting organic extract was separated, Na2SO4 dried, and concentrated. The resulting dark residue was subjected to SiO2 chromatography with ethyl acetate/hexanes (4:6) to furnish a solid. 1H NMR (300 MHz, d4-MeOH) δ 7.62 (app q, J=8.4 Hz, 1H), 7.46 (s, 1H), 7.06 (app t, J=8.7 Hz, 2H), 6.51 (s, 1H), 6.41-6.37 (m, 2H), 5.37 (s, 2H), 5.32 (s, 2H), 2.61 (s, 3H); LC/MS C-18 column, tr=2.63 minutes (5 to 95% acetonitrile/water over 5 minutes at 1 ml/min with detection 254 nm, at 50° C.). ES-MS m/z 410 (M+H). ES-HRMS m/z 410.0177 (M+H calcd for C18H15BrF2NO3 requires 410.0198).

Workup

washwashed (3×200 mL)
extractionThe resulting organic extract
customwas separated
dry with materialNa2SO4 dried
concentrationconcentrated
customto furnish a solid

Sources & evidence

ORD record: ord-0df7ba6a1d5d4bd6a06b2f981922c430
Source dataset: uspto-grants-2006_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07067540B2

Reaction notes

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