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Water → 8-bromo-2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene

HRID 1530485
Notes
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Reaction equation

HRID 1530485 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[NH:9][CH:10]=[C:11]([C:13]3[N:17]([CH:18]([CH3:20])[CH3:19])[N:16]=[CH:15][N:14]=3)[N:12]=2)=[C:4](F)[CH:3]=1.C1(=O)O[CH2:25][CH2:24][O:23]1.C(=O)([O-])[O-].[Cs+].[Cs+].O>CN(C=O)C>[Br:1][C:2]1[CH:7]=[CH:6][C:5]2[C:8]3[N:9]([CH:10]=[C:11]([C:13]4[N:17]([CH:18]([CH3:20])[CH3:19])[N:16]=[CH:15][N:14]=4)[N:12]=3)[CH2:25][CH2:24][O:23][C:4]=2[CH:3]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 962WaterHCID 7303Ethylene carbonateHCID 10796Cesium carbonate2×HCID 178456683HCID 178456683, compound

Product 1

HCID 582043138-bromo-2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azuleneYield 58%

Reagents, catalysts & solvents 1

HCID 6228
Dimethylformamide
Solvent

Conditions

Temperature
100 °C

Procedure

A solution of 5-[2-(4-bromo-2-fluoro-phenyl)-1H-imidazol-4-yl]-1-isopropyl-1H-[1,2,4]triazole (10.0 g, 28.6 mmol) in DMF (100 mL) was treated with ethylene carbonate (5.3 g, 60.1 mmol) and cesium carbonate (13.9 g, 42.5 mmol) and then heated at 100° C. for 72 h. Further cesium carbonate (9.0 g, 27.5 mmol) and water (0.5 mL) were added and heating continued for 24 h before concentrating the reaction mixture in vacuo. The resultant residue was partitioned between DCM and water, the organic layer was isolated, washed with water then brine, dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, 1% MeOH in DCM) to give 95 as an off-white solid (5.78 g, 58%). 1H NMR δ (ppm) (CDCl3): 8.04 (1H, s), 7.83 (1H, s), 7.50-7.38 (3H, m), 5.93-5.84 (1H, m), 4.07-4.02 (2H, m), 3.93-3.88 (2H, m), 1.53-1.46 (6H, m)

Workup

  1. temperatureheating
  2. concentrationbefore concentrating the reaction mixture in vacuo
  3. customThe resultant residue was partitioned between DCM and water
  4. customthe organic layer was isolated
  5. washwashed with water
  6. dry with materialbrine, dried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-c6f0252297b84168801395998b9107ad
Source dataset
uspto-grants-2015_07
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09090628B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes