Bromoacetonitrile → Tert-butyl(1-(4-(6-(cyanomethyl)-5-oxo-3-phenyl-5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)phenyl)cyclobutyl)carbamate

HRID 1509108Notes

Reaction equation

HRID 1509108 reaction equation
[C:1]([O:5][C:6](=[O:35])[NH:7][C:8]1([C:12]2[CH:17]=[CH:16][C:15]([C:18]3[C:27]([C:28]4[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=4)=[CH:26][C:25]4[C:24](=[O:34])[NH:23][CH2:22][CH2:21][C:20]=4[N:19]=3)=[CH:14][CH:13]=2)[CH2:11][CH2:10][CH2:9]1)([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].Br[CH2:39][C:40]#[N:41].[NH4+].[Cl-]>CN(C=O)C>[C:1]([O:5][C:6](=[O:35])[NH:7][C:8]1([C:12]2[CH:13]=[CH:14][C:15]([C:18]3[C:27]([C:28]4[CH:29]=[CH:30][CH:31]=[CH:32][CH:33]=4)=[CH:26][C:25]4[C:24](=[O:34])[N:23]([CH2:39][C:40]#[N:41])[CH2:22][CH2:21][C:20]=4[N:19]=3)=[CH:16][CH:17]=2)[CH2:11][CH2:10][CH2:9]1)([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 11534BromoacetonitrileHCID 24758Sodium hydrideHCID 25517Ammonium ChlorideHCID 124023320Tert-butyl(1-(4-(5-oxo-3-phenyl-5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)phenyl)cyclobutyl)carbamate

Product 1

HCID 131734399Tert-butyl(1-(4-(6-(cyanomethyl)-5-oxo-3-phenyl-5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)phenyl)cyclobutyl)carbamateYield 29%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of tert-butyl(1-(4-(5-oxo-3-phenyl-5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)phenyl)cyclobutyl)carbamate (31 mg, 0.07 mmol) in dry DMF (1 mL) was added sodium hydride (3 mg, 0.07 mmol) at 0° C. under nitrogen. After 1 h at 0° C., 2-bromoacetonitrile (14 μL, 0.20 mmol) was added and the resulting mixture was stirred for an additional 30 min at 0° C. A saturated solution of NH4Cl was added and the mixture was extracted with dichloromethane (3×) using a phase separator (Isolute® SPE). The combined organic phases were concentrated to dryness under reduced pressure. The resulting residue was purified by silica gel chromatography (gradient 0 to 40% EtOAc in hexane) to give the title compound (10 mg, 29%). 1H NMR (500 MHz, CDCl3): 8.36 (1H, s), 7.35 (2H,d), 7.30 (2H, d), 7.27-7.26 (3H, m), 7120-7.18 (2H, m), 5.05 (1H, br s), 4.59 (2H, s), 3.86 (2H, t), 3.40 (2H, t), 2.55-2.25 (4H, m), 2.10-2.02 (1H, m), 1.85-1.76 (1H, m), 1.44-1.18 (9H, br).

Workup

  1. extractionthe mixture was extracted with dichloromethane (3×)
  2. concentrationThe combined organic phases were concentrated to dryness under reduced pressure
  3. customThe resulting residue was purified by silica gel chromatography (gradient 0 to 40% EtOAc in hexane)

Sources & evidence

ORD record
ord-0f70784ee5214d52846553a14163fa47
Source dataset
uspto-grants-2015_12
Patent number
US09221838B2

Reaction notes

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