2-Pyrazinecarboxylic acid → 3,3-Dimethyl-2-{3-[(pyrazine-2-carbonyl)-amino]-phenyl}-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid

HRID 2045162Notes

Reaction equation

[N:1]1[CH:6]=[CH:5][N:4]=[CH:3][C:2]=1[C:7]([OH:9])=O.C(N1C=CN=C1)(N1C=CN=C1)=O.[NH2:22][C:23]1[CH:24]=[C:25]([CH:29]2[C:38]([CH3:40])([CH3:39])[CH2:37][C:36]3[C:31](=[CH:32][CH:33]=[C:34]([C:41]([OH:43])=[O:42])[CH:35]=3)[NH:30]2)[CH:26]=[CH:27][CH:28]=1>CN(C)C=O>[CH3:39][C:38]1([CH3:40])[CH2:37][C:36]2[C:31](=[CH:32][CH:33]=[C:34]([C:41]([OH:43])=[O:42])[CH:35]=2)[NH:30][CH:29]1[C:25]1[CH:26]=[CH:27][CH:28]=[C:23]([NH:22][C:7]([C:2]2[CH:3]=[N:4][CH:5]=[CH:6][N:1]=2)=[O:9])[CH:24]=1

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of pyrazine-2-carboxylic acid (1.26 g, 10 mmol) and 1,1′-carbonyldiimidazole (2.14 g, 13 mmol) in N,N-dimethylformamide (8 mL) was stirred at 70° C. for 1 h. Then a solution of 2-(3-amino-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid (3 g, mmol) in N,N-dimethylformamide (5 mL) was added and the mixture was allowed to stir at 25° C. for 1 h. Purification by Waters automated flash system (column: Xterra 30 mm×100 mm, sample manager 2767, pump 2525, detector: ZQ mass and UV 2487, solvent system: acetonitrile and 0.1% formic acid in water) afforded 3,3-dimethyl-2-{3-[(pyrazine-2-carbonyl)-amino]-phenyl}-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid (1.82 g, 45%) as a light yellow solid: LC/MS m/e calcd for C23H22N4O3 (M+H)+: 403.46, observed: 403.5.

Workup

customPurification by Waters automated flash system (column: Xterra 30 mm×100 mm, sample manager 2767, pump 2525, detector: ZQ mass and UV 2487, solvent system: acetonitrile and 0.1% formic acid in water)

Sources & evidence

ORD record: ord-1559c71ae1e541a99e1fef305ee8b049
Source dataset: uspto-grants-2013_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08586747B2

Reaction notes

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