Sodium Bicarbonate → 3-(8-bromo-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-2-yl)-4-(2-chlorophenyl)-1H-1,2,4-triazol-5(4H)-one

HRID 627986Notes

Reaction equation

HRID 627986 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[C:11]3[S:12][C:13]([C:15](=[N:24][NH2:25])[NH:16][C:17]4[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=4[Cl:23])=[CH:14][C:10]=3[CH2:9][CH2:8][O:7][C:6]=2[CH:26]=1.[C:27](C1NC=CN=1)(C1NC=CN=1)=[O:28].C(=O)(O)[O-].[Na+]>C1COCC1>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[C:11]3[S:12][C:13]([C:15]4[N:16]([C:17]5[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=5[Cl:23])[C:27](=[O:28])[NH:25][N:24]=4)=[CH:14][C:10]=3[CH2:9][CH2:8][O:7][C:6]=2[CH:26]=1

Participants

5

Reactant 3

HCID 516892Sodium BicarbonateHCID 5250894Bis-(1H-imidazol-2-YL)-methanoneHCID 178514378HCID 178514378, compound

Product 1

HCID 579001113-(8-bromo-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-2-yl)-4-(2-chlorophenyl)-1H-1,2,4-triazol-5(4H)-oneYield 56.4%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of crude 8-bromo-N-(2-chlorophenyl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-2-carbohydrazonamide (about 1.15 mmol) in dry THF (10 mL) was added carbonyl diimidazole (373 mg, 2.3 mmol). The reaction mixture was stirred at room temperature until completion judged by LCMS. Aqueous sodium bicarbonate was added and the mixture extracted with ethyl acetate. The combined organics were washed with brine, dried over sodium sulfate, concentrated and the residue purified by flash column chromatography (10-100% ethyl acetate in hexanes) to give 279 as a colorless solid (308 mg).

Workup

  1. extractionthe mixture extracted with ethyl acetate
  2. washThe combined organics were washed with brine
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated
  5. customthe residue purified by flash column chromatography (10-100% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-a0b6d46c816d42aaa7e90463a817c7e1
Source dataset
uspto-grants-2016_04
Patent number
US09309265B2

Reaction notes

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