Dichloroacetic Acid → 3-(5-chloro-4-[(2,4-difluorobenzyl)oxy]-2-methyl-6-oxopyrimidin-1(6H)-yl]-4-methylbenzoic acid

HRID 350952Notes

Reaction equation

[F:1][C:2]1[CH:27]=[C:26]([F:28])[CH:25]=[CH:24][C:3]=1[CH2:4][O:5][C:6]1[N:7]=[C:8]([CH3:23])[N:9]([C:13]2[CH:14]=[C:15]([CH:19]=[CH:20][C:21]=2[CH3:22])[C:16]([OH:18])=[O:17])[C:10](=[O:12])[CH:11]=1.[Cl:29]N1C(=O)CCC1=O.ClC(Cl)C(O)=O>C(#N)C>[Cl:29][C:11]1[C:10](=[O:12])[N:9]([C:13]2[CH:14]=[C:15]([CH:19]=[CH:20][C:21]=2[CH3:22])[C:16]([OH:18])=[O:17])[C:8]([CH3:23])=[N:7][C:6]=1[O:5][CH2:4][C:3]1[CH:24]=[CH:25][C:26]([F:28])=[CH:27][C:2]=1[F:1]

Participants

Conditions

Temperature: 70 °C

Procedure

To a suspension of 3-[4-[(2,4-difluorobenzyl)oxy]-2-methyl-6-oxopyrimidin-1(6H)-yl]-4-methylbenzoic acid (1.0 g, 2.6 mmol) in anhydrous acetonitrile (15 mL) was added N-chlorosuccinimide (0.38 g, 2.9 mmol) and dichloroacetic acid (0.2 mL, 2.6 mmol). The reaction was heated in oil bath (70° C.) overnight under nitrogen. The reaction mixture was concentrated under reduced pressure to remove acetonitrile. The resulting residue was washed with water for 30 min, filtered, and rinsed with water. The white solid (830 mg, 82%) was dried in vacuo. 1H-NMR (CD3OD, 400 MHz) δ 8.09 (dd, 1H, J=1.6 Hz), 7.88 (d, 1H, J=2 Hz), 7.56 (m, 2H), 7.01 (m, 2H), 5.57 (s, 2H), 2.16 (s, 3H), 2.13(s, 3H); ES-HRMS m/z 421.0753 (M+H C20H16ClF2N2O4 requires 421.0761).

Workup

concentrationThe reaction mixture was concentrated under reduced pressure
customto remove acetonitrile
washThe resulting residue was washed with water for 30 min
filtrationfiltered
washrinsed with water
dry with materialThe white solid (830 mg, 82%) was dried in vacuo

Sources & evidence

ORD record: ord-392470d9c57c4e1981dc5bb225828c74
Source dataset: uspto-grants-2007_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07183287B2

Reaction notes

Loading…