Sodium Hydroxide → HCID 60197176, compound

HRID 1630506Notes

Reaction equation

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

Participants

Conditions

Temperature: 65 °C

Procedure

To a solution of 4-[2-(2,8-dimethyl-1,2,3,4-tetrahydro-pyrido[4,3-b]indol-5-yl)-1-hydroxy-ethyl]-benzoic acid ethyl ester (800 mg, 2.04 mmol) in 5 mL EtOH was added sodium hydroxide (327 mg, 8.17 mmol, in 5 mL water) and heated to 65° C. After complete conversion of starting material (TLC and LCMS), the EtOH and water were removed under reduced pressure. The crude product was passed through HPLC to yield 600 mg of 4-[2-(2,8-dimethyl-1,2,3,4-tetrahydro-pyrido[4,3-b]indol-5-yl)-1-hydroxy-ethyl]-benzoic acid. 1H NMR (DMSO, freebase) δ (ppm): 7.79 (d, 2H), 7.29 (s, 1H), 7.17 (d, 2H), 7.09 (s, 1H), 6.88 (d, 1H), 5.5 b (s, 1H), 4.82 (t, 1H), 4.12 (dd, 1H), 4.06 (dd, 1H), 3.44 (s, 2H), 3.16 (s, 2H), 2.71 (d, 1H), 2.56 (m, 2H), 2.36 s (7H). Separation by chiral HPLC provides enantiomers 67a and 67b.

Workup

customAfter complete conversion of starting material (TLC and LCMS), the EtOH and water were removed under reduced pressure

Sources & evidence

ORD record: ord-c8aadee5141142f19c45f22e2cfea922
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08791132B2

Reaction notes

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