Hydrochloric Acid → 4-[3-(5-Methyl-pyrazin-2-yl)-ureido]-3-(pyridin-3-ylmethoxy)-benzoic acid

HRID 1830743Notes

Reaction equation

HRID 1830743 reaction equation
C[O:2][C:3](=[O:29])[C:4]1[CH:9]=[CH:8][C:7]([NH:10][C:11]([NH:13][C:14]2[CH:19]=[N:18][C:17]([CH3:20])=[CH:16][N:15]=2)=[O:12])=[C:6]([O:21][CH2:22][C:23]2[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=2)[CH:5]=1.[OH-].[Li+].Cl>CO>[CH3:20][C:17]1[N:18]=[CH:19][C:14]([NH:13][C:11](=[O:12])[NH:10][C:7]2[CH:8]=[CH:9][C:4]([C:3]([OH:29])=[O:2])=[CH:5][C:6]=2[O:21][CH2:22][C:23]2[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=2)=[N:15][CH:16]=1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 672560024-[3-(5-Methyl-pyrazin-2-yl)-ureido]-3-(pyridin-3-ylmethoxy)-benzoic acid methyl ester

Product 1

HCID 220463194-[3-(5-Methyl-pyrazin-2-yl)-ureido]-3-(pyridin-3-ylmethoxy)-benzoic acidYield 90%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a stirred solution of 4-[3-(5-methyl-pyrazin-2-yl)-ureido]-3-(pyridin-3-ylmethoxy)-benzoic acid methyl ester (1.3 gm; 3.3 mmol) in methanol (25 mL) was added lithium hydroxide (5 mL of a 2M aqueous solution). The reaction was heated to 60 degrees and stirred for 12 hours. The reaction was allowed to cool to room temperature and the pH was adjusted to 5.5 with 1N hydrochloric acid. A precipitate formed which was filtered and dried under reduced pressure to yield the desired product as a tan solid (90% yield). 1H-NMR (400 MHz, d6-DMSO) δ10.29 (s, 1H), 8.79 (s, 1H), 8.68 (d, 1H, 8.59 (br s, 1H), 8.48 (d, 1H, 7.70 (s, 1H), 7.62 (d, 1H), 7.51 (m, 1H), 5.32 (s, 2H), 2.32 (s, 3H).

Workup

  1. temperatureThe reaction was heated to 60 degrees
  2. customA precipitate formed which
  3. filtrationwas filtered
  4. customdried under reduced pressure

Sources & evidence

ORD record
ord-995b968d456d4e64b4c3faaaa0988333
Source dataset
uspto-grants-2006_06
Patent number
US07067506B2

Reaction notes

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