Acetic Acid → 9-Bromo-2-[2-(2,4-difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene

HRID 1949915Notes

Reaction equation

HRID 1949915 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:14][CH2:13][CH2:12][C:11]3[S:10][C:9]([C:15]([NH2:17])=O)=[N:8][C:7]=3[C:6]=2[CH:18]=1.[CH3:19]OC(OC)N(C)C.CC(O)=O.Cl.[F:32][C:33]1[CH:38]=[C:37]([F:39])[CH:36]=[CH:35][C:34]=1[NH:40][NH2:41]>C1(C)C=CC=CC=1.O>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:14][CH2:13][CH2:12][C:11]3[S:10][C:9]([C:15]4[N:40]([C:34]5[CH:35]=[CH:36][C:37]([F:39])=[CH:38][C:33]=5[F:32])[N:41]=[CH:19][N:17]=4)=[N:8][C:7]=3[C:6]=2[CH:18]=1

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 78373Dimethylformamide dimethyl acetalHCID 27333012,4-Difluorophenylhydrazine hydrochlorideHCID 582039029-Bromo-4,5-dihydro-[1]benzoxepino[5,4-d]thiazole-2-carboxamide

Product 1

HCID 532348939-Bromo-2-[2-(2,4-difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azuleneYield 31%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 1140TolueneSolvent

Conditions

Temperature
100 °C

Procedure

A stirred suspension of 9-bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid amide (0.70 g; 2.2 mmol) and dimethylformamide dimethylacetal (DMF DMA, 6 ml) in toluene (5 ml) was heated at 100° C. overnight (16 h) upon which time the reaction mixture was concentrated. To the resulting residue was added AcOH (5 ml), water (0.5 ml) and 2,4-difluorophenylhydrazine hydrochloride (0.56 g; 3.1 mmol) and the resulting solution heated at 100° C. for 3 h. The reaction mixture was concentrated, the residue was dissolved in CH2Cl2 (50 ml) and washed with satd. NaHCO3 (50 ml). The organic layer was separated (hydrophobic frit), concentrated and purified by ISCO to give 399 as a cream-coloured solid (0.31 g; 31%). δH (400 MHz, CDCl3) 3.41 (t, J=5.2, 2H), 4.36 (t, J=5.2, 2H), 6.89 (d, J=8.8, 1H), 7.14-7.20 (m, 2H), 7.27-7.30 (m, 1H), 7.55-7.61 (m, 1H), 7.69 (d, J=2.8, 1H), 8.16 (s, 1H). [M+H]+: 462

Workup

  1. concentrationwas concentrated
  2. temperaturethe resulting solution heated at 100° C. for 3 h
  3. concentrationThe reaction mixture was concentrated
  4. dissolutionthe residue was dissolved in CH2Cl2 (50 ml)
  5. washwashed with satd
  6. customThe organic layer was separated (hydrophobic frit)
  7. concentrationconcentrated
  8. custompurified by ISCO

Sources & evidence

ORD record
ord-4040d829e9af440ca6b8a48609d6c291
Source dataset
uspto-grants-2013_03
Patent number
US08399690B2

Reaction notes

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