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Triethylamine → 1-[3-(Trifluoromethyl)phenyl]-3-[(trimethylsilyl)ethynyl]pyridazin-4(1H)-one

HRID 1805485
Notes
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Reaction equation

HRID 1805485 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.[CH3:19][Si:20]([C:23]#[CH:24])([CH3:22])[CH3:21].CCN(CC)CC>C1COCC1.[Cl-].[Na+].O.[Cu]I.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:16][C:15]([F:18])([F:17])[C:11]1[CH:10]=[C:9]([N:4]2[CH:5]=[CH:6][C:7](=[O:8])[C:2]([C:24]#[C:23][Si:20]([CH3:22])([CH3:21])[CH3:19])=[N:3]2)[CH:14]=[CH:13][CH:12]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

9

Reactant 3

HCID 8471TriethylamineHCID 66111Trimethylsilylacetylene3×HCID 58072447HCID 58072447, compound

Product 1

HCID 580725071-[3-(Trifluoromethyl)phenyl]-3-[(trimethylsilyl)ethynyl]pyridazin-4(1H)-oneYield 28%

Reagents, catalysts & solvents 5

HCID 11776TriphenylphosphineCatalyst
HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)Catalyst
HCID 178418476HCID 178418476, compoundCatalyst
HCID 8028TetrahydrofuranSolvent
HCID 57417360Sodium chloride; waterSolvent

Conditions

Temperature
40 °C

Procedure

A mixture of 3-bromo-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one (500 mg, 1.57 mmol), (trimethylsilyl)acetylene (0.222 mL, 1.57 mmol), Et3N (0.329 mL, 2.36 mmol), CuI (4.5 mg, 0.0236 mmol), Pd(PPh3)2Cl2 (55.1 mg, 0.0785 mmol) and PPh3 (10.3 mg, 0.0393 mmol) in THF (7.5 mL) was heated to 40° C. for 8 h under Ar. To the suspension was added (trimethylsilyl)acetylene (0.111 mL, 0.785 mmol). The suspension was heated to 40° C. for 14 h under Ar. To the suspension was added (trimethylsilyl)acetylene (0.0888 mL, 0.628 mmol). The suspension was heated to 40° C. for 96 h under Ar. The mixture was diluted with brine, extracted with EtOAc, dried over MgSO4, filtered, concentrated in vacuo and purified by column chromatography on silica gel (hexane/EtOAc=50/50 to 0/100) to yield the title compound (148 mg, 28% yield) as a brown solid: 1H NMR (DMSO-d6, 300 MHz): δ ppm 0.26 (9H, s), 6.64 (1H, d, J=7.9 Hz), 7.75-7.92 (2H, m), 8.00-8.15 (2H, m), 8.90 (1H, d, J=8.3 Hz

Workup

  1. temperatureThe suspension was heated to 40° C. for 14 h under Ar
  2. temperatureThe suspension was heated to 40° C. for 96 h under Ar
  3. extractionextracted with EtOAc
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. custompurified by column chromatography on silica gel (hexane/EtOAc=50/50 to 0/100)

Sources & evidence

ORD record
ord-6c6349a22cb447c99ed86d728d3afd86
Source dataset
uspto-grants-2013_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08354411B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes