Tetrahydrofuran → 2-(1-isopropyl-3-methyl-1H-1,2,4-triazol-5-yl)-9-vinyl-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine

HRID 1629487Notes

Reaction equation

HRID 1629487 reaction equation
Br[C:2]1[CH:24]=[CH:23][C:5]2[C:6]3[N:7]([CH:11]=[C:12]([C:14]4[N:18]([CH:19]([CH3:21])[CH3:20])[N:17]=[C:16]([CH3:22])[N:15]=4)[N:13]=3)[CH2:8][CH2:9][O:10][C:4]=2[CH:3]=1.C(=O)([O-])[O-].[Cs+].[Cs+].[CH2:31]1COC[CH2:32]1>O.[Cl-].[Na+].O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH:19]([N:18]1[C:14]([C:12]2[N:13]=[C:6]3[C:5]4[CH:23]=[CH:24][C:2]([CH:31]=[CH2:32])=[CH:3][C:4]=4[O:10][CH2:9][CH2:8][N:7]3[CH:11]=2)=[N:15][C:16]([CH3:22])=[N:17]1)([CH3:21])[CH3:20]

Participants

7

Reactant 3

HCID 8028TetrahydrofuranHCID 10796Cesium carbonateHCID 582043229-Bromo-2-(1-isopropyl-3-methyl-1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine

Product 1

HCID 582046742-(1-isopropyl-3-methyl-1H-1,2,4-triazol-5-yl)-9-vinyl-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepineYield 89%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 57417360Sodium chloride; waterSolvent

Procedure

9-bromo-2-(1-isopropyl-3-methyl-1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine 411 (0.5 g, 0.001 mol) and vinyltrifluoroborane/potassium hydride (0.34 g, 0.0026 mol) was dissolved in THF (5 mL) and 1 mL H2O (Tremblay-Morin et al (2006) Tetrahedron Letters 47(18):3043-3046). Cesium Carbonate (1.2 g, 0.0039 mol) was added and mixture was degassed with N2 for 10 minutes. Tetrakis(triphenylphosphine)palladium(0) (0.074 g, 0.064 mmol) was added. The reaction vessel was sealed and was heated at 110 C in an oil bath overnight. The reaction mixture was cooled to room temperature and the seal was removed. The crude product was isolated from an aqueous workup using H2O and brine. The crude product was purified using flash column chromatography (0-10% MeOH in DCM) to give 2-(1-isopropyl-3-methyl-1H-1,2,4-triazol-5-yl)-9-vinyl-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine (0.300 g, 89% yield

Workup

  1. custommixture was degassed with N2 for 10 minutes
  2. customThe reaction vessel was sealed
  3. temperaturewas heated at 110 C in an oil bath overnight
  4. customthe seal was removed
  5. customThe crude product was isolated from an aqueous workup
  6. customThe crude product was purified

Sources & evidence

ORD record
ord-929df13afce240c89c846924b8851a8b
Source dataset
uspto-grants-2014_07
Patent number
US08785626B2

Reaction notes

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