Acetic Anhydride → 1-[2-(Acetylamino)ethyl]-7-[(4-fluorophenyl)methyl]-4-hydroxy-N-{2-[(1-methylethyl)oxy]ethyl}-2-oxo-1,2-dihydro-1,5-naphthyridine-3-carboxamide

HRID 2364385Notes

Reaction equation

HRID 2364385 reaction equation
[NH2:1][CH2:2][CH2:3][N:4]1[C:13]2[C:8](=[N:9][CH:10]=[C:11]([CH2:14][C:15]3[CH:20]=[CH:19][C:18]([F:21])=[CH:17][CH:16]=3)[CH:12]=2)[C:7]([OH:22])=[C:6]([C:23]([NH:25][CH2:26][CH2:27][O:28][CH:29]([CH3:31])[CH3:30])=[O:24])[C:5]1=[O:32].C(N(C(C)C)CC)(C)C.[C:42](OC(=O)C)(=[O:44])[CH3:43]>CN(C=O)C>[C:42]([NH:1][CH2:2][CH2:3][N:4]1[C:13]2[C:8](=[N:9][CH:10]=[C:11]([CH2:14][C:15]3[CH:16]=[CH:17][C:18]([F:21])=[CH:19][CH:20]=3)[CH:12]=2)[C:7]([OH:22])=[C:6]([C:23]([NH:25][CH2:26][CH2:27][O:28][CH:29]([CH3:30])[CH3:31])=[O:24])[C:5]1=[O:32])(=[O:44])[CH3:43]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 81531DiisopropylethylamineHCID 694825271-(2-Aminoethyl)-7-[(4-fluorophenyl)methyl]-4-hydroxy-N-{2-[(1-methylethyl)oxy]ethyl}-2-oxo-1,2-dihydro-1,5-naphthyridine-3-carboxamide

Product 1

HCID 694830761-[2-(Acetylamino)ethyl]-7-[(4-fluorophenyl)methyl]-4-hydroxy-N-{2-[(1-methylethyl)oxy]ethyl}-2-oxo-1,2-dihydro-1,5-naphthyridine-3-carboxamide

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 1-(2-aminoethyl)-7-[(4-fluorophenyl)methyl]-4-hydroxy-N-{2-[(1-methylethyl)oxy]ethyl}-2-oxo-1,2-dihydro-1,5-naphthyridine-3-carboxamide (0.021 g, 0.046 mmol) and diisopropyl ethylamine (0.04 mL, 0.23 mmol) in DMF (5 mL) under nitrogen was treated with acetic anhydride (0.0046 mL, 0.048 mmol) at ambient temperature. The reaction was concentrated in vacuo and the resulting residue was treated with 1 N NaHSO4. Extracted the mixture twice with EtOAc, combined the organics, dried over MgSO4, filtered and concentrated the filtrate. The residue was then triturated with Et2O, filtered, and dried in vacuo to provide the title compound as an off-white solid: 1H NMR (300 MHz, DMSO-D6) δ ppm 1.1 (d, J=6.0 Hz, 6 H), 1.7 (s, 3 H), 3.3 (q, J=6.1, 2 H), 3.5 (m, 3 H), 3.6 (m, 2 H), 4.1 (s, 2 H), 4.3 (t, J=6.5 Hz, 2 H), 7.1 (m, 2 H), 7.4 (ddd, J=12.1, 5.5, 3.2 Hz, 2 H), 8.0 (d, J=6.0 Hz, 1 H), 8.2 (d, J=1.3 Hz, 1 H), 8.5 (d, J=1.5 Hz, 1 H), 10.4 (t, J=5.1 Hz, 1 H), 17.1 (s, 1 H); ES+ MS: 485 (M+H+).

Workup

  1. concentrationThe reaction was concentrated in vacuo
  2. additionthe resulting residue was treated with 1 N NaHSO4
  3. extractionExtracted the mixture twice with EtOAc
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated the filtrate
  7. customThe residue was then triturated with Et2O
  8. filtrationfiltered
  9. customdried in vacuo

Sources & evidence

ORD record
ord-46de8482f37b4422877b1144be8c7ad9
Source dataset
uspto-grants-2014_04
Patent number
US08691991B2

Reaction notes

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