2-(3-Cyclopropoxy-4-difluoromethoxyphenyl)-3-(1-pentenyl)-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one → 2-(3-Cyclopropoxy-4-difluoromethoxyphenyl)-3-pentyl-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one

HRID 2097449Notes

Reaction equation

HRID 2097449 reaction equation
[CH:1]1([O:4][C:5]2[CH:6]=[C:7]([C:15]3[N:32]([CH2:33][O:34][CH2:35][CH2:36][Si:37]([CH3:40])([CH3:39])[CH3:38])[C:18]4[CH:19]=[N:20][N:21]([CH2:24][O:25][CH2:26][CH2:27][Si:28]([CH3:31])([CH3:30])[CH3:29])[C:22](=[O:23])[C:17]=4[C:16]=3[CH:41]=[CH:42][CH2:43][CH2:44][CH3:45])[CH:8]=[CH:9][C:10]=2[O:11][CH:12]([F:14])[F:13])[CH2:3][CH2:2]1.[H][H]>[Pt]=O.C(O)C>[CH:1]1([O:4][C:5]2[CH:6]=[C:7]([C:15]3[N:32]([CH2:33][O:34][CH2:35][CH2:36][Si:37]([CH3:40])([CH3:39])[CH3:38])[C:18]4[CH:19]=[N:20][N:21]([CH2:24][O:25][CH2:26][CH2:27][Si:28]([CH3:30])([CH3:31])[CH3:29])[C:22](=[O:23])[C:17]=4[C:16]=3[CH2:41][CH2:42][CH2:43][CH2:44][CH3:45])[CH:8]=[CH:9][C:10]=2[O:11][CH:12]([F:13])[F:14])[CH2:3][CH2:2]1

Participants

5

Reactant 2

HCID 666026752-(3-Cyclopropoxy-4-difluoromethoxyphenyl)-3-(1-pentenyl)-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-oneHCID 178418361HCID 178418361, compound

Product 1

HCID 666026992-(3-Cyclopropoxy-4-difluoromethoxyphenyl)-3-pentyl-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-oneYield 62.1%

Reagents, catalysts & solvents 2

HCID 82844Platinum oxide (PtO)CatalystHCID 702EthanolSolvent

Procedure

To 26 ml of ethanol solution containing 1.08 g (1.60 mmol) of 2-(3-cyclopropoxy-4-difluoromethoxyphenyl)-3-(1-pentenyl)-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one obtained in the same manner as in Example 68-(a) was added 43.8 mg of platinum oxide, and the mixture was stirred under 1 atm hydrogen atmosphere at room temperature for 3 hours. After completion of the reaction, the insoluble material was filtered off from the reaction mixture, and the filtrate was concentrated under reduced pressure. The residue was applied to silica gel column chromatography (Eluent; hexane:ethyl acetate=1:3 (V/V)), and the fractions containing the desired compound were concentrated under reduced pressure to obtain 0.66 g of the title compound as a colorless oil. (Yield: 626).

Workup

  1. customobtained in the same manner as in Example 68-(a)
  2. customAfter completion of the reaction
  3. filtrationthe insoluble material was filtered off from the reaction mixture
  4. concentrationthe filtrate was concentrated under reduced pressure
  5. additionthe fractions containing the desired compound
  6. concentrationwere concentrated under reduced pressure

Sources & evidence

ORD record
ord-fe6ca1eee69d4d71b551a9cd2d61a62e
Source dataset
uspto-grants-2013_05
Patent number
US08450319B2

Reaction notes

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