Sodium Hydroxide → 4-((1R,3S)-3-Hydroxycyclohexylamino)-2-(methylthio)pyrimidine-5-carboxylic acid
Reaction equation
[OH:1][C@H:2]1[CH2:7][CH2:6][CH2:5][C@@H:4]([NH:8][C:9]2[C:14]([C:15]([O:17]CC)=[O:16])=[CH:13][N:12]=[C:11]([S:20][CH3:21])[N:10]=2)[CH2:3]1.[OH-].[Na+]>C(O)C>[OH:1][C@H:2]1[CH2:7][CH2:6][CH2:5][C@@H:4]([NH:8][C:9]2[C:14]([C:15]([OH:17])=[O:16])=[CH:13][N:12]=[C:11]([S:20][CH3:21])[N:10]=2)[CH2:3]1Participants
Procedure
Ethyl 4-((1R,3S)-3-hydroxycyclohexylamino)-2-(methylthio)-pyrimidine-5-carboxylate (5 g, 16.06 mmol) was dissolved in ethanol (50 mL) before adding sodium hydroxide solution (2 M in water, 20 mL, 40.0 mmol) and stirring at room temperature. After 30 min, LCMS shows mostly desired product mass. The reaction mixture was neutralized by addition of saturated aqueous citric acid solution. The resulting precipitate was filtered and dried to give 4-((1R,3S)-3-hydroxycyclohexylamino)-2-(methylthio)pyrimidine-5-carboxylic acid (4.5 g, 15.88 mmol, 99% yield) as a white solid; 1H NMR (400 MHz, DMSO-d6) δ ppm 13.21 (br. s., 1H), 8.44-8.54 (m, 2H), 4.74 (d, J=3.90 Hz, 1H), 3.97-4.12 (m, 1H), 3.56 (d, J=3.12 Hz, 1H), 2.46 (s, 3H), 2.05-2.16 (m, 1H), 1.84 (d, J=10.15 Hz, 1H), 1.65-1.80 (m, 2H), 1.11-1.36 (m, 4H); MS (ESI) m/z 284.1 [M+1]+
Sources & evidence
- ORD record
- ord-106e2d68d13d4e6298c8f1bb76c16506
- Source dataset
- uspto-grants-2015_09
- Patent number
- US09139534B2
Reaction notes
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