N-bromobutanimide → Methyl 3-[5-bromo-4-[(2,4-difluorobenzyl)oxy]-2-methyl-6-oxopyrimidin-1(6H)-yl]-4-methylbenzoate

HRID 350893Notes

Reaction equation

HRID 350893 reaction equation
[F:1][C:2]1[CH:28]=[C:27]([F:29])[CH:26]=[CH:25][C:3]=1[CH2:4][O:5][C:6]1[N:7]=[C:8]([CH3:24])[N:9]([C:13]2[CH:14]=[C:15]([CH:20]=[CH:21][C:22]=2[CH3:23])[C:16]([O:18][CH3:19])=[O:17])[C:10](=[O:12])[CH:11]=1.C1C(=O)N([Br:37])C(=O)C1>ClCCl>[Br:37][C:11]1[C:10](=[O:12])[N:9]([C:13]2[CH:14]=[C:15]([CH:20]=[CH:21][C:22]=2[CH3:23])[C:16]([O:18][CH3:19])=[O:17])[C:8]([CH3:24])=[N:7][C:6]=1[O:5][CH2:4][C:3]1[CH:25]=[CH:26][C:27]([F:29])=[CH:28][C:2]=1[F:1]

Participants

4

Reactant 2

HCID 67184N-bromobutanimideHCID 21089018Methyl 3-[4-[(2,4-difluorobenzyl)oxy]-2-methyl-6-oxopyrimidin-1(6H)-yl]-4-methylbenzoate

Product 1

HCID 21089021Methyl 3-[5-bromo-4-[(2,4-difluorobenzyl)oxy]-2-methyl-6-oxopyrimidin-1(6H)-yl]-4-methylbenzoateYield 77.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A mixture of methyl 3-[4-[(2,4-difluorobenzyl)oxy]-2-methyl-6-oxopyrimidin-1(6H)-yl]-4-methylbenzoate (0.41 g, 0.001 mol, from Step 3) and NBS (0.2 g, 0.0011 mol) in dichloromethane (5.0 mL) is stirred at room temperature for 1.5 h under argon atmosphere. The reaction mixture is purified by flash chromatography using 30% EtOAc in hexanes to furnish the title compound (0.37 g, 75%) as a white amorphous powder: 1H NMR (CD3OD/400 MHz) δ 8.04 (d, 1H, J=1.6 Hz), 7.89 (d, 1H, J=1.6 Hz), 7.62 (m, 2H), 7.01 (m, 2H), 5.56 (s, 2H), 3.89 (s, 3H), 2.15 (s, 3H), and 2.133 (s, 3H); ES-HRMS m/z 479.0412 (M+H calcd for C21H18N2O4F2Br requires 479.0413). 19F NMR(CD3OD/400 MHz) −111.870 (m) and −115.95 (m).

Workup

  1. customThe reaction mixture is purified by flash chromatography

Sources & evidence

ORD record
ord-7318429711d941eab931adc68cb9b473
Source dataset
uspto-grants-2007_02
Patent number
US07183287B2

Reaction notes

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