Triethylamine → 1,5-Bis(2-trimethylsilylethoxymethyl)-3-trimethylsilylethynyl-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one

HRID 2097494Notes

Reaction equation

HRID 2097494 reaction equation
I[C:2]1[C:10]2[C:9](=[O:11])[N:8]([CH2:12][O:13][CH2:14][CH2:15][Si:16]([CH3:19])([CH3:18])[CH3:17])[N:7]=[CH:6][C:5]=2[N:4]([CH2:20][O:21][CH2:22][CH2:23][Si:24]([CH3:27])([CH3:26])[CH3:25])[CH:3]=1.C1(P([C:41]2[CH:46]=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(N(CC)CC)C>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.O1CCCC1>[CH3:25][Si:24]([CH3:27])([CH3:26])[CH2:23][CH2:22][O:21][CH2:20][N:4]1[C:5]2[CH:6]=[N:7][N:8]([CH2:12][O:13][CH2:14][CH2:15][Si:16]([CH3:19])([CH3:18])[CH3:17])[C:9](=[O:11])[C:10]=2[C:2]([C:41]#[C:46][Si:16]([CH3:18])([CH3:17])[CH3:15])=[CH:3]1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 11776TriphenylphosphineHCID 666025043-Iodo-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one

Product 1

HCID 666033121,5-Bis(2-trimethylsilylethoxymethyl)-3-trimethylsilylethynyl-1,5-dihydropyrrolo[2,3-d]pyridazin-4-oneYield 439.2%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
60 °C

Procedure

To 50 ml of tetrahydrofuran solution containing 16.6 g (purity: 78.4%, 25.0 mmol) of 3-iodo-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one obtained in Reference example 18-(b) were added 880 mg (1.25 mmol) of bis(triphenylphosphine)palladium dichloride, 620 mg (3.25 mmol) of cuprous iodide, 1.31 g (5.00 mmol) of triphenylphosphine and 10.5 ml (75.3 mmol) of triethylamine, and the mixture was degassed under reduced pressure and replaced with argon. Then, 11 ml of trimethylsilylacetylene was added to the mixture, and the mixture was stirred at 60° C. for 24 hours. After completion of the reaction, water was added to the reaction mixture, and the mixture was extracted with toluene. The organic layer after separation was washed successively with a saturated aqueous solution of ammonium chloride and a saturated aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The obtained residue was applied to silica gel column chromatography (Eluent; hexane:ethyl acetate=9:1→4:1 (V/V)), and the fractions containing the desired compound were concentrated under reduced pressure to obtain 10.8 g of the title compound as a yellowish solid. (Yield: 88%)

Workup

  1. customthe mixture was degassed under reduced pressure
  2. additionThen, 11 ml of trimethylsilylacetylene was added to the mixture
  3. customAfter completion of the reaction, water
  4. additionwas added to the reaction mixture
  5. extractionthe mixture was extracted with toluene
  6. customThe organic layer after separation
  7. washwas washed successively with a saturated aqueous solution of ammonium chloride
  8. dry with materiala saturated aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate
  9. concentrationconcentrated under reduced pressure
  10. additionthe fractions containing the desired compound
  11. concentrationwere concentrated under reduced pressure

Sources & evidence

ORD record
ord-0c194b8d71e749d7be011a78e5f52d26
Source dataset
uspto-grants-2013_05
Patent number
US08450319B2

Reaction notes

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