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

HRID 402013Notes

Reaction equation

HRID 402013 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:15]2[N:16]=[N:17][C:18]([CH2:35][CH2:36][CH2:37][CH3:38])=[C:19]([C:21]3[CH:26]=[CH:25][C:24]([O:27][CH:28]4[CH2:33][CH2:32][CH2:31][CH2:30][CH2:29]4)=[C:23](Br)[CH:22]=3)[CH:20]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH3:39][N:40](C=O)C>O.[C-]#N.[Zn+2].[C-]#N.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.[Fe+2]>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:15]2[N:16]=[N:17][C:18]([CH2:35][CH2:36][CH2:37][CH3:38])=[C:19]([C:21]3[CH:26]=[CH:25][C:24]([O:27][CH:28]4[CH2:33][CH2:32][CH2:31][CH2:30][CH2:29]4)=[C:23]([C:39]#[N:40])[CH:22]=3)[CH:20]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 2

HCID 6228DimethylformamideHCID 673737524-[5-(3-Bromo-4-cyclohexyloxy-phenyl)-6-butyl-pyridazin-3-yloxy]-piperidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 673720424-[6-Butyl-5-(3-cyano-4-cyclohexyloxy-phenyl)-pyridazin-3-yloxy]-piperidine-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 4

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolvent

Conditions

Temperature
120 °C

Procedure

4-[5-(3-Bromo-4-cyclohexyloxy-phenyl)-6-butyl-pyridazin-3-yloxy]-piperidine-1-carboxylic acid tert-butyl ester (Example 65, 0.44 mmol, 0.26 g), Zinc cyanide (0.44 mmol, 0.052 g) in DMF (5.0 mL), water (0.05 mL) were degassed with nitrogen for 10 min then Pd2dba3 (0.022 mmol, 0.02 g), dppf (0.053 mmol, 0.029 g) was added and then degassed for 10 more min. The reaction mixture was heated at 120° C. for 36 h under nitrogen. Cooled, water was added 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 20% ethyl acetate in hexanes to get 4-[6-butyl-5-(3-cyano-4-cyclohexyloxy-phenyl)-pyridazin-3-yloxy]-piperidine-1-carboxylic acid tert-butyl ester (0.17 g).

Workup

  1. customdegassed for 10 more min
  2. temperatureCooled
  3. additionwater was added
  4. extractionextracted with ethyl acetate
  5. washThe organic layer was washed with water, brine
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated under reduced pressure
  9. customThe product was purified by column chromatography

Sources & evidence

ORD record
ord-b5ed14516d8a40ed967e59dcb6279a44
Source dataset
uspto-grants-2014_06
Patent number
US08741900B2

Reaction notes

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