Triethylamine → 7-(7-hydroxy-6-methoxyquinolin-4-yloxy)-N-(5-methylisoxazol-3-yl)-2,3-dihydrobenzo[b][1,4]oxazine-4-carboxamide

HRID 1712975Notes

Reaction equation

[O:1]1[CH2:6][CH2:5][NH:4][C:3]2[CH:7]=[CH:8][C:9]([O:11][C:12]3[C:21]4[C:16](=[CH:17][C:18]([OH:24])=[C:19]([O:22][CH3:23])[CH:20]=4)[N:15]=[CH:14][CH:13]=3)=[CH:10][C:2]1=2.[CH3:25][C:26]1[O:30][N:29]=[C:28]([NH:31][C:32](=O)[O:33]C2C=CC([N+]([O-])=O)=CC=2)[CH:27]=1.C(N(CC)CC)C>C1COCC1>[OH:24][C:18]1[CH:17]=[C:16]2[C:21]([C:12]([O:11][C:9]3[CH:8]=[CH:7][C:3]4[N:4]([C:32]([NH:31][C:28]5[CH:27]=[C:26]([CH3:25])[O:30][N:29]=5)=[O:33])[CH2:5][CH2:6][O:1][C:2]=4[CH:10]=3)=[CH:13][CH:14]=[N:15]2)=[CH:20][C:19]=1[O:22][CH3:23]

Participants

Conditions

Temperature: 50 °C

Procedure

A 25-mL round bottomed flask was charged with 4-(3,4-dihydro-2H-benzo[b][1,4]oxazin-7-yloxy)-6-methoxyquinolin-7-ol (0.124 g, 0.38 mmol), 4-nitrophenyl 5-methylisoxazol-3-ylcarbamate (0.11 g, 0.40 mmol), and THF (5.0 mL). Triethylamine (0.160 mL, 1.1 mmol) was added, the system was purged with argon, and the tube was sealed. The mixture stirred at 50° C. for 16 h. The reaction mixture was concentrated and the residue was purified via column chromatography on silica gel (RediSep 40 g column, 100% ethyl acetate for 10 min, followed by 5% methanol/dichloromethane for 20 min) to afford 7-(7-hydroxy-6-methoxyquinolin-4-yloxy)-N-(5-methylisoxazol-3-yl)-2,3-dihydrobenzo[b][1,4]oxazine-4-carboxamide (0.026 g, 15% yield) as a yellow solid.

Workup

customthe system was purged with argon
customthe tube was sealed
concentrationThe reaction mixture was concentrated
customthe residue was purified via column chromatography on silica gel (RediSep 40 g column, 100% ethyl acetate for 10 min, followed by 5% methanol/dichloromethane for 20 min)

Sources & evidence

ORD record: ord-dd37c393ebdb4c2d8ce12eff83be3ef3
Source dataset: uspto-grants-2010_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07795254B2

Reaction notes

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