Dimethylformamide → 2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-9-(2-methyl-pyridin-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene

HRID 1849061Notes

Reaction equation

HRID 1849061 reaction equation
Br[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:16]([CH:20]([CH3:22])[CH3:21])[N:17]=[CH:18][N:19]=4)=[N:8][C:7]=3[C:6]=2[CH:23]=1.[CH3:24][C:25]1[C:30](B(O)O)=[CH:29][CH:28]=[CH:27][N:26]=1.C([O-])(=O)C.[K+].CN(C=O)C>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.O>[CH:20]([N:16]1[C:15]([C:9]2[S:10][C:11]3[CH2:12][CH2:13][O:14][C:5]4[CH:4]=[CH:3][C:2]([C:30]5[C:25]([CH3:24])=[N:26][CH:27]=[CH:28][CH:29]=5)=[CH:23][C:6]=4[C:7]=3[N:8]=2)=[N:19][CH:18]=[N:17]1)([CH3:22])[CH3:21]

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 517044Potassium AcetateHCID 201116472-Methylpyridine-3-boronic acidHCID 532349749-Bromo-2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene

Product 1

HCID 582040832-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-9-(2-methyl-pyridin-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azuleneYield 28.7%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent

Conditions

Temperature
105 °C

Procedure

To 9-Bromo-2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene from Example 6 (0.388 g, 0.992 mmol), 2-methylpyridin-3-ylboronic acid (0.176 g, 1.29 mmol), potassium acetate (0.389 g, 3.96 mmol), and tetrakis(triphenylphosphine)palladium(0) (57 mg, 0.049 mmol) was added DMF (20 mL) and water (1 mL). Nitrogen was bubbled through the reaction mixture for 5 minutes. The reaction mixture was allowed to stir at 105° C. for 24 hours before cooling, diluting with EtOAc, and filtering through a pad of celite. The filtrate was concentrated under reduced pressure and diluted with EtOAc. The solution was washed sequentially with water, and brine, before drying over MgSO4 and concentrating under reduced pressure. The crude material was dissolved in DMF and purified by reverse phase HPLC to provide 128 (115 mg, 28%). 1H NMR (400 MHz, DMSO) δ 8.44 (dd, J=24.8, 2.7, 2H), 8.10 (s, 1H), 7.69 (t, J=8.1, 1H), 7.35 (ddd, J=12.5, 7.9, 3.6, 2H), 7.19 (d, J=8.3, 1H), 5.74 (dt, J=13.2, 6.7, 1H), 4.44 (t, J=4.9, 2H), 3.49 (t, J=4.9, 2H), 2.53 (s, 3H), 1.48 (d, J=6.6, 6H). MS (ESI(+)): m/z 404.1 (M+H).

Workup

  1. customNitrogen was bubbled through the reaction mixture for 5 minutes
  2. temperaturebefore cooling
  3. additiondiluting with EtOAc
  4. filtrationfiltering through a pad of celite
  5. concentrationThe filtrate was concentrated under reduced pressure
  6. additiondiluted with EtOAc
  7. washThe solution was washed sequentially with water, and brine
  8. dry with materialbefore drying over MgSO4
  9. concentrationconcentrating under reduced pressure
  10. dissolutionThe crude material was dissolved in DMF
  11. custompurified by reverse phase HPLC

Sources & evidence

ORD record
ord-e6ebda78b9f845f7bfbc6ba62d6ae286
Source dataset
uspto-grants-2015_02
Patent number
US08952043B2

Reaction notes

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