Sodium Carbonate → 4-(5-Amino-6-[(pyridin-3-ylamino)carbonyl]pyrazin-2-yl]benzoic acid

HRID 736614Notes

Reaction equation

[NH2:1][C:2]1[C:3]([C:9]([NH:11][C:12]2[CH:13]=[N:14][CH:15]=[CH:16][CH:17]=2)=[O:10])=[N:4][C:5](Br)=[CH:6][N:7]=1.[C:18]([C:21]1[CH:26]=[CH:25][C:24](B(O)O)=[CH:23][CH:22]=1)([OH:20])=[O:19].C(=O)([O-])[O-].[Na+].[Na+]>O1CCCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:1][C:2]1[N:7]=[CH:6][C:5]([C:24]2[CH:25]=[CH:26][C:21]([C:18]([OH:20])=[O:19])=[CH:22][CH:23]=2)=[N:4][C:3]=1[C:9]([NH:11][C:12]1[CH:13]=[N:14][CH:15]=[CH:16][CH:17]=1)=[O:10]

Participants

Conditions

Temperature: 75 °C

Procedure

Pd(PPh3)4 (1.05 g, 0.91 mmol) was added to a to a solution of 3-amino-6-bromo-N-pyridin-3-ylpyrazine-2-carboxamide (2.0 g, 6.8 mmol), 4-carboxyphenylboronic acid (1.12 g, 6.7 mmol), and sodium carbonate (2.88 g, 27.2 mmol) in tetrahydrofuran/water, (1:1, 240 mL), and the resulting mixture was heated at 75° C. for 16 days. The solvent was evaporated and the residue dissolved in water. The aqueous phase was washed with ethyl acetate and then neutralized (pH 7) using HCl (10% aq.). The formed crystals were filtered off and dried in vacuo to give 1.7 g (77% yield) of the title compound: MS (ES) m/z 336 (M++1).

Workup

customThe solvent was evaporated
dissolutionthe residue dissolved in water
washThe aqueous phase was washed with ethyl acetate
filtrationThe formed crystals were filtered off
customdried in vacuo

Sources & evidence

ORD record: ord-b782d03119934601a1b9bb2a7e729378
Source dataset: uspto-grants-2009_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07595319B2

Reaction notes

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