Sodium Carbonate → 3-(2-Phenylthiophen-3-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one

HRID 1624781Notes

Reaction equation

HRID 1624781 reaction equation
Br[C:2]1[C:7](=[O:8])[CH:6]=[CH:5][N:4]([C:9]2[CH:14]=[CH:13][CH:12]=[C:11]([C:15]([F:18])([F:17])[F:16])[CH:10]=2)[N:3]=1.[C:19]1([C:25]2[S:26][CH:27]=[CH:28][C:29]=2B(O)O)[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.C([O-])([O-])=O.[Na+].[Na+]>COCCOC.O.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>[C:19]1([C:25]2[S:26][CH:27]=[CH:28][C:29]=2[C:2]2[C:7](=[O:8])[CH:6]=[CH:5][N:4]([C:9]3[CH:14]=[CH:13][CH:12]=[C:11]([C:15]([F:18])([F:17])[F:16])[CH:10]=3)[N:3]=2)[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=1

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 57573251(2-Phenylthiophen-3-yl)boronic acidHCID 58072447HCID 58072447, compound

Product 1

HCID 580722373-(2-Phenylthiophen-3-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-oneYield 23%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 3-bromo-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one (137 mg, 0.428 mmol), (2-phenylthiophen-3-yl)boronic acid (87.4 mg, 0.428 mmol), Na2CO3 (136 mg, 1.28 mmol) and Pd(PPh3)4 (24.7 mg, 0.021 mmol) in DME (1.6 mL) and water (0.49 mL) was heated to 80° C. for 18 h under Ar atmosphere. The mixture was diluted with water, extracted with AcOEt, washed with NaHCO3 aqueous solution, dried over Na2SO4, filtered, concentrated in vacuo, purified by column chromatography on basic silica gel (hexane/AcOEt=80/20 to 0/100) and recrystallized with AcOEt/heptane to yield the title compound (38.6 mg, 23% yield) as a white solid: mp 167-168° C. 1H NMR (DMSO-d6, 300 MHz): δ ppm 6.62 (1H, d, J=8.0 Hz), 7.30-7.41 (5H, m), 7.47 (1H, brs), 7.51 (1H, d, J=5.2 Hz), 7.55-7.72 (4H, m), 8.91 (1H, d, J=8.0 Hz). Anal. Calcd for C21H13F3N2OS: C, 63.31; H, 3.29; N, 7.03. Found: C, 63.08; H, 3.37; N, 7.01.

Workup

  1. extractionextracted with AcOEt
  2. washwashed with NaHCO3 aqueous solution
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. custompurified by column chromatography on basic silica gel (hexane/AcOEt=80/20 to 0/100)
  7. customrecrystallized with AcOEt/heptane

Sources & evidence

ORD record
ord-42ead78c84124c06bc9de7f54bc0be58
Source dataset
uspto-grants-2014_07
Patent number
US08778944B2

Reaction notes

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