Cesium carbonate → methyl 2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine-9-carboxylate

HRID 886186Notes

Reaction equation

HRID 886186 reaction equation
I[C:2]1[N:3]=[C:4]2[C:10]3[CH:11]=[CH:12][C:13]([C:15]([O:17][CH3:18])=[O:16])=[CH:14][C:9]=3[O:8][CH2:7][CH2:6][N:5]2[CH:19]=1.[CH:20]([N:23]1[CH:27]=[N:26][CH:25]=[N:24]1)([CH3:22])[CH3:21].C(=O)([O-])[O-].[Cs+].[Cs+].[OH-].[NH4+].O>[Cu]I.CC([O-])=O.CC([O-])=O.[Pd+2].CCOC(C)=O.CN(C=O)C>[CH:20]([N:23]1[C:27]([C:2]2[N:3]=[C:4]3[C:10]4[CH:11]=[CH:12][C:13]([C:15]([O:17][CH3:18])=[O:16])=[CH:14][C:9]=4[O:8][CH2:7][CH2:6][N:5]3[CH:19]=2)=[N:26][CH:25]=[N:24]1)([CH3:22])[CH3:21]

Participants

9

Reactant 4

HCID 10796Cesium carbonateHCID 127624431-(propan-2-yl)-1H-1,2,4-triazoleHCID 58204516Methyl 2-iodo-5,6-dihydroimidazo[1,2-d][1,4]benzoxazepine-9-carboxylateHCID 86589665Water ammonium hydroxide

Product 1

HCID 58204510methyl 2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine-9-carboxylateYield 28.3%

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 167845palladium(II) acetateCatalystHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

To methyl 2-iodo-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine-9-carboxylate (1.0 g, 2.7 mmol), 1-isopropyl-1H-1,2,4-triazole (0.30 g, 2.7 mmol), CuI (1.5 g, 8.1 mmol), Pd(OAc)2(0.061 g, 0.27 mmol), and cesium carbonate (2.2 g, 6.8 mmol) was added DMF (26 mL). The reaction mixture was allowed to stir and heat at 100° C. for 24 hours in a sealed vial. The reaction mixture was cooled to room temperature and poured into a mixture of ammonium hydroxide/water (1:2) and EtOAc and filtered through a pad of silica. The layers were separated and the aqueous portion was extracted with EtOAc. The combined organic extracts were washed with ammonium hydroxide (1:2), water, brine, dried over MgSO4, and concentrated under reduced pressure. The crude material was purified by column chromatography on silica gel eluting with EtOAc to provide 184 (0.270 g, 28%). 1H NMR (400 MHz, DMSO) δ 8.54 (d, J=8.4, 1H), 7.97 (d, J=35.2, 2H), 7.70 (dd, J=8.4, 1.7, 1H), 7.57 (d, J=1.7, 1H), 5.99-5.70 (m, 1H), 4.57 (q, J=5.9, 4H), 3.87 (s, 3H), 1.49 (d, J=6.6, 6H). MS (ESI(+)): m/z 354.1 (M+H).

Workup

  1. temperatureThe reaction mixture was cooled to room temperature
  2. filtrationfiltered through a pad of silica
  3. customThe layers were separated
  4. extractionthe aqueous portion was extracted with EtOAc
  5. washThe combined organic extracts were washed with ammonium hydroxide (1:2), water, brine
  6. dry with materialdried over MgSO4
  7. concentrationconcentrated under reduced pressure
  8. customThe crude material was purified by column chromatography on silica gel eluting with EtOAc

Sources & evidence

ORD record
ord-e076533a7a904adc90294353ee47a52a
Source dataset
uspto-grants-2012_08
Patent number
US08242104B2

Reaction notes

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