Water → 4-[5-(3-Bromo-4-cyclohexyloxy-phenyl)-6-butyl-pyridazin-3-yloxy]-piperidine-1-carboxylic acid tert-butyl ester

HRID 2168734Notes

Reaction equation

HRID 2168734 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([OH:14])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[Br:17][C:18]1[CH:19]=[C:20]([C:31]2[CH:36]=[C:35](Cl)[N:34]=[N:33][C:32]=2[CH2:38][CH2:39][CH2:40][CH3:41])[CH:21]=[CH:22][C:23]=1[O:24][CH:25]1[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]1.O>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:35]2[N:34]=[N:33][C:32]([CH2:38][CH2:39][CH2:40][CH3:41])=[C:31]([C:20]3[CH:21]=[CH:22][C:23]([O:24][CH:25]4[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]4)=[C:18]([Br:17])[CH:19]=3)[CH:36]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 962WaterHCID 24758Sodium hydrideHCID 643502Tert-butyl 4-hydroxypiperidine-1-carboxylateHCID 866578204-(3-Bromo-4-cyclohexyloxy-phenyl)-3-butyl-6-chloro-pyridazine

Product 1

HCID 673737524-[5-(3-Bromo-4-cyclohexyloxy-phenyl)-6-butyl-pyridazin-3-yloxy]-piperidine-1-carboxylic acid tert-butyl esterYield 77.7%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a stirred solution of 4-hydroxy-piperidine-1-carboxylic acid tert-butyl ester (5.33 mmol, 1.07 g) in THF at room temperature, NaH (100 mg, 4.5 mmol) was added and stirring continued for 30 min then 4-(3-Bromo-4-cyclohexyloxy-phenyl)-3-butyl-6-chloro-pyridazine (3.50 mmol, 1.5 g) was added. The resulting mixture was stirred at 50° C. for over night, poured into water and extracted with ethyl acetate. The organic layer was washed with water, brine dried (Na2SO4) filtered and concentrated under reduced pressure. The product was purified by column chromatography using 10-20% ethyl acetate in hexanes to provide 4-[5-(3-bromo-4-cyclohexyloxy-phenyl)-6-butyl-pyridazin-3-yloxy]-piperidine-1-carboxylic acid tert-butyl ester (1.6 g).

Workup

  1. stirringThe resulting mixture was stirred at 50° C. for over night
  2. extractionextracted with ethyl acetate
  3. washThe organic layer was washed with water, brine
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe product was purified by column chromatography

Sources & evidence

ORD record
ord-022d5cf7b7914f8780770fac7731bfbe
Source dataset
uspto-grants-2015_06
Patent number
US09045461B2

Reaction notes

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