Citric Acid → HCID 22050084, compound

HRID 1867009Notes

Reaction equation

HRID 1867009 reaction equation
[Br:1][C:2]1[C:3](=[O:31])[N:4]([CH2:19][C:20]2[N:21]=[CH:22][C:23]([C:26]([O:28]CC)=[O:27])=[N:24][CH:25]=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].[OH-].[Na+].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>>[Br:1][C:2]1[C:3](=[O:31])[N:4]([CH2:19][C:20]2[N:21]=[CH:22][C:23]([C:26]([OH:28])=[O:27])=[N:24][CH:25]=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

4

Reactant 3

HCID 311Citric AcidHCID 14798Sodium HydroxideHCID 22050032Ethyl 5-{[3-bromo-4-[(2,4-difluorobenzyl)oxy]-6-methyl-2-oxopyridin-1(2H)-yl]methyl}pyrazine-2-carboxylate

Product 1

HCID 22050084HCID 22050084, compoundYield 77%

Procedure

A suspension of ethyl 5-{[3-bromo-4-[(2,4-difluorobenzyl)oxy]-6-methyl-2-oxopyridin-1(2H)-yl]methyl}pyrazine 2-carboxylate (0.18 g, 0.002 mol) and 1N NaOH (0.6 mL in 1:1 v/v EtOH/Water) was stirred at room temperature for 1.5 h. The reaction mixture was acidified with 5% citric acid and filtered the precipitate. It was washed with water, followed by ethanol and dried in vacuo to afford the title compound (0.14 g, 77%) as a light brown powder: 1H NMR (CD3OD/400 MHz)=δ 9.03 (s. 1H), 8.60 (s, 1H), 7.61 (m. 1H), 7.00 (m, 2H), 6.52 (s, 1H), 5.51 (s, 2H), 5.30 (s. 2H), and 2.52 (s, 3H); 19F NMR (CD3OD/400 MHz)=δ−8-111.75 (m) and −116.06 (m); ES-HRMS m/z 466.0209 (M+H C19H15N4O3BrF2 requires 466.0209).

Workup

  1. filtrationfiltered the precipitate
  2. washIt was washed with water
  3. customdried in vacuo

Sources & evidence

ORD record
ord-91865f9b051f49f8bb0b226025b6f2d9
Source dataset
uspto-grants-2009_12
Patent number
US07629363B2

Reaction notes

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