5-Ethenylpyridine-2-carboxylic acid → 5-(2-(3,9-dimethyl-2,3,4,5-tetrahydroazepino[4,5-b]indol-6(1H)-yl)ethyl)picolinic acid

HRID 1045563Notes

Reaction equation

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

Participants

Conditions

Temperature: 90 °C

Procedure

The title compound was prepared by following general procedure 4. To a solution of 3,9-dimethyl-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole (200 mg, 0.93 mmol) in 50% aq. NaOH solution (3 mL) was added, tetra n-butyl ammonium chloride (12 mg, 0.046 mmol) followed by 5-vinylpicolinic acid (153 mg, 1.0 mmol). The reaction mixture was heated at 90° C. for overnight, and the reaction was monitored by TLC. After completion of reaction, the reaction mixture was diluted with water, extracted with ethyl acetate. The organic layer was separated, dried over Na2SO4, and concentrated under reduced pressure. The crude product was purified by reverse phase chromatography to afford 7 mg of 5-(2-(3,9-dimethyl-2,3,4,5-tetrahydroazepino[4,5-b]indol-6(1H)-yl)ethyl)picolinic acid as the TFA salt.

Workup

customThe title compound was prepared
customAfter completion of reaction
extractionextracted with ethyl acetate
customThe organic layer was separated
dry with materialdried over Na2SO4
concentrationconcentrated under reduced pressure
customThe crude product was purified by reverse phase chromatography

Sources & evidence

ORD record: ord-306f6c2749644ace990b176192d14090
Source dataset: uspto-grants-2013_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08569287B2

Reaction notes

Loading…