9-(4,5-dihydrofuran-2-yl)-2-(4-ethyl-1H-imidazol-1-yl)-7,8-dihydro-[1,4]diazepino[7,1-a]isoquinolin-5(4H)-one → 2-(4-ethyl-1H-imidazol-1-yl)-9-(tetrahydrofuran-2-yl)-7,8-dihydro-[1,4]diazepino[7,1-a]isoquinolin-5(4H)-one

HRID 532949Notes

Reaction equation

HRID 532949 reaction equation
[O:1]1[CH2:5][CH2:4][CH:3]=[C:2]1[C:6]1[CH:15]=[CH:14][CH:13]=[C:12]2[C:7]=1[CH2:8][CH2:9][N:10]1[C:20](=[O:21])[CH2:19][N:18]=[C:17]([N:22]3[CH:26]=[C:25]([CH2:27][CH3:28])[N:24]=[CH:23]3)[CH:16]=[C:11]12>C1COCC1.[Ni]>[CH2:27]([C:25]1[N:24]=[CH:23][N:22]([C:17]2[CH:16]=[C:11]3[C:12]4[C:7]([CH2:8][CH2:9][N:10]3[C:20](=[O:21])[CH2:19][N:18]=2)=[C:6]([CH:2]2[CH2:3][CH2:4][CH2:5][O:1]2)[CH:15]=[CH:14][CH:13]=4)[CH:26]=1)[CH3:28]

Participants

4

Reactant 1

HCID 867113929-(4,5-dihydrofuran-2-yl)-2-(4-ethyl-1H-imidazol-1-yl)-7,8-dihydro-[1,4]diazepino[7,1-a]isoquinolin-5(4H)-one

Product 1

HCID 733360192-(4-ethyl-1H-imidazol-1-yl)-9-(tetrahydrofuran-2-yl)-7,8-dihydro-[1,4]diazepino[7,1-a]isoquinolin-5(4H)-oneYield 25%

Reagents, catalysts & solvents 2

HCID 935NickelCatalystHCID 8028TetrahydrofuranSolvent

Procedure

Example 111. A flask was charged with 9-(4,5-dihydrofuran-2-yl)-2-(4-ethyl-1H-imidazol-1-yl)-7,8-dihydro-[1,4]diazepino[7,1-a]isoquinolin-5(4H)-one (250 mg, 0.67 mmol) in 20 mL THF and Raney-Nickel (100 mg, 0.67 mmol) was added. The flask was evacuated in vacuo and then filled with H2. The mixture was stirred at RT for 36 h. The reaction mixture was then filtered and the filtrate concentrated in vacuo. The residue obtained was purified by flash chromatography (SiO2, DCM to DCM/MeOH 9:1) and the product obtained was recrystallized from heptane to give the title compound (63 mg; racemic) as beige solid. UPLC-MS: MS 377.3 (M+H+); UPLC rt 0.83 min. 1H NMR (400 MHz, DMSO-d6): δ ppm 1.13 (t, J=7.62 Hz, 3 H); 1.47-1.64 (m, 1 H); 1.81-2.00 (m, 2 H); 2.24-2.40 (m, 1 H); 2.40-2.55 (m, 2 H); 2.74-3.04 (m, 2 H); 3.59-3.74 (m, 1 H); 3.81 (q, J=7.56 Hz, 1 H); 3.86-3.97 (m, 1 H); 4.03 (q, J=7.17 Hz, 1 H); 4.21 (br. s., 2 H); 5.04 (t, J=7.04 Hz, 1 H); 7.06-7.17 (m, 1 H); 7.25-7.44 (m, 2 H); 7.52 (d, J=7.43 Hz, 1 H); 7.89 (d, J=8.21 Hz, 1 H); 8.12 (s, 1 H).

Workup

  1. additionwas added
  2. customThe flask was evacuated in vacuo
  3. additionfilled with H2
  4. filtrationThe reaction mixture was then filtered
  5. concentrationthe filtrate concentrated in vacuo
  6. customThe residue obtained
  7. customwas purified by flash chromatography (SiO2, DCM to DCM/MeOH 9:1)
  8. customthe product obtained
  9. customwas recrystallized from heptane

Sources & evidence

ORD record
ord-403d6b3797064a8ea7d8b275cd6a1bf0
Source dataset
uspto-grants-2014_10
Patent number
US08853203B2

Reaction notes

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