Potassium Carbonate → 5-(2-Chloro-6-fluorophenyl)-2-{4-[6-(trifluoromethyl)pyridin-3-yl]phenyl}-2,4-dihydro-3H-1,2,4-triazol-3-one

HRID 59419Notes

Reaction equation

HRID 59419 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:12](=[O:13])[NH:11][C:10]([C:14]3[C:19]([F:20])=[CH:18][CH:17]=[CH:16][C:15]=3[Cl:21])=[N:9]2)=[CH:4][CH:3]=1.[F:22][C:23]([F:34])([F:33])[C:24]1[N:29]=[CH:28][C:27](B(O)O)=[CH:26][CH:25]=1.C([O-])([O-])=O.[K+].[K+]>CS(C)=O>[Cl:21][C:15]1[CH:16]=[CH:17][CH:18]=[C:19]([F:20])[C:14]=1[C:10]1[NH:11][C:12](=[O:13])[N:8]([C:5]2[CH:6]=[CH:7][C:2]([C:27]3[CH:28]=[N:29][C:24]([C:23]([F:34])([F:33])[F:22])=[CH:25][CH:26]=3)=[CH:3][CH:4]=2)[N:9]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 251342782-(Trifluoromethyl)pyridine-5-boronic AcidHCID 1366448592-(4-bromophenyl)-5-(2-chloro-6-fluorophenyl)-2,4-dihydro-3H-1,2,4-triazol-3-one

Product 1

HCID 1364924385-(2-Chloro-6-fluorophenyl)-2-{4-[6-(trifluoromethyl)pyridin-3-yl]phenyl}-2,4-dihydro-3H-1,2,4-triazol-3-oneYield 25.5%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Conditions

Temperature
110 °C

Procedure

To a solution of 2-(4-bromophenyl)-5-(2-chloro-6-fluorophenyl)-2,4-dihydro-3H-1,2,4-triazol-3-one (Intermediate-1, 0.100 g, 0.271 mmol) in DMSO (3.0 mL) was added [6-(trifluoromethyl)pyridin-3-yl]boronic acid (0.078 g, 0.40 mmol), K2CO3 (0.112 g, 0.81 mmol) and tetrakistriphenyl phosphine palladium (0) (0.062 g, 0.054 mmol). The reaction mass was stirred at 110° C. for 24-48 h. The reaction mass was quenched in water and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulphate and concentrated. The obtained product was purified with column chromatography on silica gel eluting with 4-5% EA:DCM to afford 0.030 g of the desired product. 1H NMR (300 MHz, DMSO d6): δ 7.38-7.48 (m, 1H), 7.61-7.63 (m, 1H), 7.88-7.99 (m, 4H), 8.01-8.17 (m, 2H), 8.41 (d, J=7.8 Hz, 1H), 9.14 (s, 1H), 12.60 (br s, 1H). MS (m/z): 435.25 (M+H)+.

Workup

  1. customThe reaction mass was quenched in water
  2. extractionextracted with ethyl acetate
  3. dry with materialThe organic layer was dried over anhydrous sodium sulphate
  4. concentrationconcentrated
  5. customThe obtained product was purified with column chromatography on silica gel eluting with 4-5% EA

Sources & evidence

ORD record
ord-3b24de0843f9426586b10b47974be0b4
Source dataset
uspto-grants-2016_09
Patent number
US09439890B2

Reaction notes

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