Ethanol → 6-(6-(3-Ethylureido)pyridin-3-yl)-1-(2-methoxyethyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

HRID 2243024Notes

Reaction equation

[CH2:1]([NH:3][C:4](=[O:32])[NH:5][C:6]1[N:11]=[CH:10][C:9]([C:12]2[CH:13]=[C:14]3[C:19](=[CH:20][CH:21]=2)[N:18]([CH2:22][CH2:23][O:24][CH3:25])[CH:17]=[C:16]([C:26]([O:28]CC)=[O:27])[C:15]3=[O:31])=[CH:8][CH:7]=1)[CH3:2].[OH-].[Na+].C(O)C>O1CCCC1>[CH2:1]([NH:3][C:4](=[O:32])[NH:5][C:6]1[N:11]=[CH:10][C:9]([C:12]2[CH:13]=[C:14]3[C:19](=[CH:20][CH:21]=2)[N:18]([CH2:22][CH2:23][O:24][CH3:25])[CH:17]=[C:16]([C:26]([OH:28])=[O:27])[C:15]3=[O:31])=[CH:8][CH:7]=1)[CH3:2]

Participants

Conditions

Temperature: 60 °C

Procedure

A suspension of ethyl 6-(6-(3-ethylureido)pyridin-3-yl)-1-(2-methoxyethyl)-4-oxo-1,4-dihydroquinoline-3-carboxylate (Example 42, 59 mg, 0.13 mmol) and sodium hydroxide (0.202 mL, 0.40 mmol) in tetrahydrofuran (1 mL) was heated to 60° C. After 2 h, the reaction was not yet complete. Ethanol (2 mL) was added and the reaction was heated for another 1 h, then cooled to room temperature and concentrated under reduced pressure. The resulting solid was dissolved in water and acidified to pH 4 with 10% HCl. The solid that formed was collected by filtration and placed under high vacuum to remove residual water. MS (ESP): 411 (M+H+) for C21H22N4O5; NMR: 1.11 (t, J=6 Hz, 3H), 3.20 (m, 2H), 3.23 (s, 3H), 3.74 (m, 2H), 4.83 (m, 2H), 7.50 (m, 1H), 8.01 (br s, 1H), 8.21 (m, 1H), 8.31 (m, 1H), 8.58 (m, 1H), 8.69 (m, 1H), 8.94 (s, 1H), 9.38 (s, 1H), 15.20 (s, 1H).

Workup

temperaturethe reaction was heated for another 1 h
temperaturecooled to room temperature
concentrationconcentrated under reduced pressure
dissolutionThe resulting solid was dissolved in water
customThe solid that formed
filtrationwas collected by filtration
customto remove residual water

Sources & evidence

ORD record: ord-876c084895ee4a9085c1e42b0cdffd5f
Source dataset: uspto-grants-2010_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07674801B2

Reaction notes

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