Heptanoyl chloride → HCID 68284534, compound

HRID 2408668Notes

Reaction equation

HRID 2408668 reaction equation
[CH3:1][N:2]1[CH2:24][CH2:23][C:5]2[N:6]([CH2:14][CH:15]([C:17]3[CH:22]=[CH:21][N:20]=[CH:19][CH:18]=3)[OH:16])[C:7]3[CH:8]=[CH:9][C:10]([CH3:13])=[CH:11][C:12]=3[C:4]=2[CH2:3]1.[H-].[Na+].[C:27](Cl)(=[O:34])[CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH3:33]>CN(C=O)C>[CH3:1][N:2]1[CH2:24][CH2:23][C:5]2[N:6]([CH2:14][CH:15]([O:16][C:27](=[O:34])[CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH3:33])[C:17]3[CH:18]=[CH:19][N:20]=[CH:21][CH:22]=3)[C:7]3[CH:8]=[CH:9][C:10]([CH3:13])=[CH:11][C:12]=3[C:4]=2[CH2:3]1

Participants

5

Reactant 3

HCID 17313Heptanoyl chlorideHCID 24758Sodium hydrideHCID 49779650HCID 49779650, compound

Product 1

HCID 68284534HCID 68284534, compoundYield 0.6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To an ice-cooled stirred solution of 2-(2,8-dimethyl-1,2,3,4-tetrahydro-pyrido[4,3-b]indol-5-yl)-1-pyridin-4-yl-ethanol (2.5 g, 7.78 mmol) in DMF (5 mL) was added sodium hydride (373 mg, 15.56 mmol). After stirring for 20 min, heptanoyl chloride (1.9 g, 13.23 mmol) was added into the reaction mixture, which was stirred at 0° C. for 30 min. The progress of reaction was monitored by LCMS and TLC. The reaction mixture was quenched with ice water (200 mL) and extracted with EtOAc (400 mL). The combined organic layer was washed with water, dried over anhydrous sodium sulfate and concentrated. The residue was purified by silica gel column chromatography (6% MeOH-DCM), followed by reverse phase HPLC to yield heptanoic acid 2-(2,8-dimethyl-1,2,3,4-tetrahydro-pyrido[4,3-b]indol-5-yl)-1-pyridin-4-yl-ethyl ester (20 mg). 1H NMR (CD3OD, TFA salt) δ (ppm): 8.74 (s, 2H), 7.91 (s, 2H), 7.28 (m, 2H), 7.04 (t, 1H), 6.2 (m 1H), 4.7 (d 1H), 4.59 (m, 2H), 4.3 (m, 1H), 3.5 (t, 1H), 3.34 (m, 1H), 3.31 (m, 2H), 3.12 (s, 3H), 2.4 (s, 3H), 2.3 (m, 2H), 2.1 (m, 1H), 1.35 (m, 2H), 1.22 (m, 2H), 1.15 (m, 3H), 0.86 (t, 3H). Separation by chiral HPLC provides enantiomers 338a-b.

Workup

  1. stirringwas stirred at 0° C. for 30 min
  2. customThe progress of reaction
  3. customThe reaction mixture was quenched with ice water (200 mL)
  4. extractionextracted with EtOAc (400 mL)
  5. washThe combined organic layer was washed with water
  6. dry with materialdried over anhydrous sodium sulfate
  7. concentrationconcentrated
  8. customThe residue was purified by silica gel column chromatography (6% MeOH-DCM)

Sources & evidence

ORD record
ord-86ebe78583ae4f0890066ec483cae390
Source dataset
uspto-grants-2014_08
Patent number
US08815843B2

Reaction notes

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