Water → 3-[5-(4-Benzyloxy-phenyl)-6-butyl-pyridazin-3-yloxymethyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 2168610Notes

Reaction equation

HRID 2168610 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH:10]([CH2:13][OH:14])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[CH2:17]([O:24][C:25]1[CH:30]=[CH:29][C:28]([C:31]2[CH:36]=[C:35](Cl)[N:34]=[N:33][C:32]=2[CH2:38][CH2:39][CH2:40][CH3:41])=[CH:27][CH:26]=1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.O>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH:10]([CH2:13][O:14][C:35]2[N:34]=[N:33][C:32]([CH2:38][CH2:39][CH2:40][CH3:41])=[C:31]([C:28]3[CH:27]=[CH:26][C:25]([O:24][CH2:17][C:18]4[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=4)=[CH:30][CH:29]=3)[CH:36]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 24758Sodium hydrideHCID 5237175tert-Butyl 3-(hydroxymethyl)pyrrolidine-1-carboxylateHCID 713030894-(4-(Benzyloxy)phenyl)-3-butyl-6-chloropyridazine

Product 1

HCID 673747103-[5-(4-Benzyloxy-phenyl)-6-butyl-pyridazin-3-yloxymethyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a stirred solution of 3-hydroxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (1.5 mmol, 302 mg) in THF (4.0 mL) at 0° C., NaH (60% dispersion in mineral oil, 1.5 mmol, 60 mg) was added and stirring continued for 10 min at room temperature, then 4-(4-benzyloxy-phenyl)-3-butyl-6-chloro-pyridazine (Example 1, 1.0 mmol, 352 mg) was added. The resulting mixture was stirred at 50° C. for 1 hour, poured into water and extracted with ethyl acetate. The organic layers were combined and concentrated under reduced pressure. The product was purified by column chromatography using 50% ethyl acetate in hexanes to give 3-[5-(4-benzyloxy-phenyl)-6-butyl-pyridazin-3-yloxymethyl]-pyrrolidine-1-carboxylic acid tert-butyl ester, which was dissolved in dichloromethane (1.0 mL), added 4.0 M HCl in dioxane (1.0 mL) and stirred at room temperature for 1 hour. Solvents were evaporated to provide 4-(4-benzyloxy-phenyl)-3-butyl-6-(pyrrolidin-3-ylmethoxy)-pyridazine dihydrochloride.

Workup

  1. stirringThe resulting mixture was stirred at 50° C. for 1 hour
  2. extractionextracted with ethyl acetate
  3. concentrationconcentrated under reduced pressure
  4. customThe product was purified by column chromatography

Sources & evidence

ORD record
ord-a88b505457ed4ffd96a79df145d0f5d9
Source dataset
uspto-grants-2015_06
Patent number
US09045461B2

Reaction notes

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