Sodium Cyanate → 2-[3-(1-Isopropyl-ureido)-phenyl]-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

HRID 2045204Notes

Reaction equation

[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:21]=[CH:20][CH:19]=[C:18]([NH:22][CH:23]([CH3:25])[CH3:24])[CH:17]=1)[C:10]([CH3:27])([CH3:26])[CH2:9]2)=[O:5])[CH3:2].[O-:28][C:29]#[N:30].[Na+]>C(O)(=O)C.O>[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:21]=[CH:20][CH:19]=[C:18]([N:22]([CH:23]([CH3:24])[CH3:25])[C:29]([NH2:30])=[O:28])[CH:17]=1)[C:10]([CH3:26])([CH3:27])[CH2:9]2)=[O:5])[CH3:2]

Participants

Conditions

Temperature: 40 °C

Procedure

To a solution of 2-(3-isopropylamino-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (310 mg, 0.85 mmol) in acetic acid (2 mL) and water (2 mL) was added a solution of sodium cyanate (110 mg, 1.7 mmol) in water (2 mL) dropwise at 40° C. The reaction mixture was stirred at 40° C. for 4 h. Then the reaction mixture was extracted with ethyl acetate (2×50 mL), washed with water, dried over anhydrous sodium sulfate and concentrated in vacuo to afford 2-[3-(1-isopropyl-ureido)-phenyl]-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (347 mg, 100%) as a brown oil which was used for next step without further purification: LC/MS m/e calcd for C24H31N3O3 (M+H)+: 410.53, observed: 410.1.

Workup

extractionThen the reaction mixture was extracted with ethyl acetate (2×50 mL)
washwashed with water
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-54a3ab9faa4f448abdd7cf3f73f6e9c7
Source dataset: uspto-grants-2013_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08586747B2

Reaction notes

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