Lithium Hydroxide → isopropyl 4-(1-(3-((4-methoxy-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)methylcarbamoyl)-2-methyl-1H-indol-1-yl)ethyl)piperidine-1-carboxylate

HRID 2206531Notes

Reaction equation

HRID 2206531 reaction equation
Cl.[CH3:2][O:3][C:4]1[CH:9]=[C:8]([CH3:10])[NH:7][C:6](=[O:11])[C:5]=1[CH2:12][NH:13][C:14]([C:16]1[C:24]2[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=2)[N:18]([CH:25]([CH:27]2[CH2:32][CH2:31][NH:30][CH2:29][CH2:28]2)[CH3:26])[C:17]=1[CH3:33])=[O:15].CN(C=O)C.C1COCC1.C(N(C(C)C)C(C)C)C.[C:53](Cl)(=[O:58])[O:54][CH:55]([CH3:57])[CH3:56].[Li+].[OH-]>>[CH3:2][O:3][C:4]1[CH:9]=[C:8]([CH3:10])[NH:7][C:6](=[O:11])[C:5]=1[CH2:12][NH:13][C:14]([C:16]1[C:24]2[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=2)[N:18]([CH:25]([CH:27]2[CH2:28][CH2:29][N:30]([C:53]([O:54][CH:55]([CH3:57])[CH3:56])=[O:58])[CH2:31][CH2:32]2)[CH3:26])[C:17]=1[CH3:33])=[O:15]

Participants

7

Reactant 6

HCID 3939Lithium HydroxideHCID 6228DimethylformamideHCID 7917Isopropyl chloroformateHCID 8028TetrahydrofuranHCID 81531DiisopropylethylamineHCID 117780708HCID 117780708, compound2×

Product 1

HCID 117807954isopropyl 4-(1-(3-((4-methoxy-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)methylcarbamoyl)-2-methyl-1H-indol-1-yl)ethyl)piperidine-1-carboxylateYield 55.2%

Conditions

Temperature
0 °C

Procedure

A 250 mL round bottom flask was charged with a magnetic stir bar, (R or S)—N-((4-methoxy-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-2-methyl-1-(1-(piperidin-4-yl)ethyl)-1H-indole-3-carboxamide hydrochloride (0.467 g, 0.987 mmol) (Compound 326), DMF (2.468 ml, 0.987 mmol), THF (2.468 ml, 0.987 mmol), and N-ethyl-N-isopropylpropan-2-amine (0.638 g, 4.94 mmol). The reaction was cooled to 0° C. and isopropyl carbonochloridate (0.160 ml, 1.086 mmol) was added drop wise via syringe. The reaction was allowed to stir for 2 h to rt and was then treated with 5 N LiOH for 1H to remove any acylated pyridone. This material was extracted with ethyl acetate, washed with brine, dried with MgSO4 and filtered and conc. in vacuo. The resulting material was purified via silica gel chromatography (50 g) using ethyl acetate/MeOH (5:1) as eluent to afford pure title compound as a pale yellow solid (0.300 g, 0.545 mmol, 55.2% yield). LCMS 523 (M+1)+; 1H NMR (DMSO-d6, 400) MHz) δ 11.59 (br. s., 1H), 7.74 (d, J=7.8 Hz, 1H), 7.69 (t, J=4.9 Hz, 1H), 7.62 (d, J=7.8 Hz, 1H), 7.13-7.01 (m, 2H), 6.15 (s, 1H), 4.78-4.67 (m, 1H), 4.32 (d, J=4.9 Hz, 2H), 4.23-4.12 (m, 1H), 4.12-4.02 (m, 1H), 3.84 (s, 3H), 3.82-3.74 (m, 1H), 2.79-2.66 (m, 1H), 2.58 (s, 3H), 2.46-2.34 (m, 2H), 2.20 (s, 3H), 1.96-1.88 (m, 1H), 1.58-1.46 (m, 4H), 1.15 (d, J=6.0 Hz, 6H), 0.95-0.89 (m, 1H), 0.74-0.65 (m, 1H).

Workup

  1. additionA 250 mL round bottom flask was charged with a magnetic stir bar
  2. customto remove any acylated pyridone
  3. extractionThis material was extracted with ethyl acetate
  4. washwashed with brine
  5. dry with materialdried with MgSO4
  6. filtrationfiltered and conc. in vacuo
  7. customThe resulting material was purified via silica gel chromatography (50 g)

Sources & evidence

ORD record
ord-aac5e8cc593f42dc8628fd84d423f40f
Source dataset
uspto-grants-2016_06
Patent number
US09371331B2

Reaction notes

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