Dimethylformamide → 1-Benzyloxymethyl-3-formyl-5-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one

HRID 2097517Notes

Reaction equation

HRID 2097517 reaction equation
[CH2:1]([O:8][CH2:9][N:10]1[C:14]2[CH:15]=[N:16][N:17]([CH2:20][O:21][CH2:22][CH2:23][Si:24]([CH3:27])([CH3:26])[CH3:25])[C:18](=[O:19])[C:13]=2[C:12](I)=[CH:11]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(CC)CC)C.C([SiH](CC)CC)C.CN(C)[CH:45]=[O:46]>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.C1(P(C2C=CC=CC=2)[C-]2C=CC=C2)C=CC=CC=1.[C-]1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=C1.[Fe+2].O>[CH2:1]([O:8][CH2:9][N:10]1[C:14]2[CH:15]=[N:16][N:17]([CH2:20][O:21][CH2:22][CH2:23][Si:24]([CH3:27])([CH3:26])[CH3:25])[C:18](=[O:19])[C:13]=2[C:12]([CH:45]=[O:46])=[CH:11]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

8

Reactant 4

HCID 6228DimethylformamideHCID 8471TriethylamineHCID 12052TriethylsilaneHCID 666027841-Benzyloxymethyl-3-iodo-5-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one

Product 1

HCID 866270441-Benzyloxymethyl-3-formyl-5-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-oneYield 40%

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalystHCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)CatalystHCID 962WaterSolvent

Procedure

In 500 ml of an autoclave made of stainless were charged 45.3 g (86.8 mmol) of 1-benzyloxymethyl-3-iodo-5-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one obtained in Reference example 33-(c), 390 mg (1.74 mmol) of palladium acetate, 1.92 g (3.47 mmol) of 1,1′-bis(diphenylphosphino)ferrocene, 30.2 ml (220 mmol) of triethylamine, 27.7 ml (170 mmol) of triethylsilane and 300 ml of N,N-dimethylformamide, and the mixture was stirred at 80° C. for 8 hours under carbon monoxide atmosphere of 15 atm. 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 with 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=4:1 (V/V)), and the fractions containing the desired compound were concentrated under reduced pressure to obtain 14.2 g of the title compound as a brownish solid. (Yield: 40%)

Workup

  1. additionwas added to the reaction mixture
  2. extractionthe mixture was extracted with toluene
  3. customThe organic layer after separation
  4. washwas washed with a saturated aqueous solution of sodium chloride
  5. dry with materialdried over anhydrous magnesium sulfate
  6. concentrationconcentrated under reduced pressure
  7. additionthe fractions containing the desired compound
  8. concentrationwere concentrated under reduced pressure

Sources & evidence

ORD record
ord-aee974adc1cd4ad09b68a6657a22e3c9
Source dataset
uspto-grants-2013_05
Patent number
US08450319B2

Reaction notes

Loading…