Sodium Hydroxide → 2-({5-[3(2-Pyridylamino)propoxy]indolyl}methyl)octanoic acid

HRID 1295121Notes

Reaction equation

HRID 1295121 reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[NH:7][CH2:8][CH2:9][CH2:10][O:11][C:12]1[CH:13]=[C:14]2[C:18](=[CH:19][CH:20]=1)[NH:17][C:16]([CH2:21][CH:22]([CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH3:32])[C:23]([O:25]C)=[O:24])=[CH:15]2.[OH-].[Na+]>CO.O>[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[NH:7][CH2:8][CH2:9][CH2:10][O:11][C:12]1[CH:13]=[C:14]2[C:18](=[CH:19][CH:20]=1)[NH:17][C:16]([CH2:21][CH:22]([CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH3:32])[C:23]([OH:25])=[O:24])=[CH:15]2

Participants

5

Reactant 2

HCID 14798Sodium HydroxideHCID 22570317Methyl 2-({5-[3-(2-pyridylamino)propoxy]indolyl}methyl)octanoate

Product 1

HCID 225703192-({5-[3(2-Pyridylamino)propoxy]indolyl}methyl)octanoic acidYield 891.9%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

To a solution of methyl 2-({5-[3-(2-pyridylamino)propoxy]indolyl}methyl)octanoate (0.04 g, 0.09 mmol), as prepared in the preceding step, in methanol (5.0 mL) was added a solution of NaOH (0.1 g, 2.5 mmol) in H2O (0.3 mL), and the reaction was stirred at ambient temperature overnight. After evaporating the solvent in vacuo, the residue is taken up in H12O (5 mL) and acidified to pH 4–5 with 10% HCl, and extracted with ethyl acetate (2×15 mL). The combined organic layers were washed with brine, dried (Na2SO4), filtered and concentrated. The residue was purified by flash chromatography on silica gel (4% methanol in methylene chloride) to give the title compound as an oil (0.34 g, 90%). 1H-NMR (400 MHz, CDCl3) δ 7.72 (m, 1H), 7.48 (m, 1H), 7.26 (d, 8.9 Hz, 1H), 7.02 (d, J=2.7 Hz, 2H), 6.77 (dd, J=8.9, 2.4 Hz, 1H), 6.50 (m, 2H), 6.28 (d, J=2.9 Hz, 1H), 4.27 (dd, J=14.2, 8.6 Hz, 1H), 3.99 (m, 3H), 3.32 (t, J=6.7 Hz, 2H), 2.85 (br s, 1H), 1.95 (m, 2H), 1.67 (m, 1H), 1.30 (m, 9H), 0.84 (t, J=6.6 Hz, 3H). Mass spectrum (LCMS, ESI pos.) Calcd. for C25H33N3O3 424.2 (M+H); Found: 424.7.

Workup

  1. customAfter evaporating the solvent in vacuo
  2. extractionextracted with ethyl acetate (2×15 mL)
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified by flash chromatography on silica gel (4% methanol in methylene chloride)

Sources & evidence

ORD record
ord-0122b642d710436dab439d5ef7b84435
Source dataset
uspto-grants-2007_07
Patent number
US07241789B2

Reaction notes

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