Formaldehyde → HCID 58438409, compound

HRID 401939Notes

Reaction equation

HRID 401939 reaction equation
[Cl-].[Cl-].[CH2:3]([C:7]1[N:8]=[N:9][C:10]([O:26][CH2:27][CH:28]2[C:33]([F:35])([F:34])[CH2:32][CH2:31][NH:30][CH2:29]2)=[CH:11][C:12]=1[C:13]1[CH:18]=[CH:17][C:16]([O:19][CH:20]2[CH2:25][CH2:24][CH2:23][CH2:22][CH2:21]2)=[CH:15][CH:14]=1)[CH2:4][CH2:5][CH3:6].C=O.[C:38](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(O)(=O)C.C(Cl)Cl>[CH2:3]([C:7]1[N:8]=[N:9][C:10]([O:26][CH2:27][CH:28]2[C:33]([F:35])([F:34])[CH2:32][CH2:31][N:30]([CH3:38])[CH2:29]2)=[CH:11][C:12]=1[C:13]1[CH:18]=[CH:17][C:16]([O:19][CH:20]2[CH2:21][CH2:22][CH2:23][CH2:24][CH2:25]2)=[CH:15][CH:14]=1)[CH2:4][CH2:5][CH3:6]

Participants

6

Reactant 3

HCID 712FormaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 86657794HCID 86657794, compound

Product 1

HCID 58438409HCID 58438409, compoundYield 64.6%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidCatalystHCID 6344DichloromethaneSolvent

Procedure

A suspension of 3-butyl-4-(4-cyclohexyloxy-phenyl)-6-(4,4-difluoro-piperidin-3-ylmethoxy)-pyridazine dichloride (0.17 mmol, 90 mg), 37% paraformaldehyde (0.4 mmol, 32 mg), and 1 drop of acetic acid in 5 mL of DCM was stirred for 5 min then added sodium triacetoxyborohydride (0.4 mmol, 85 mg) and continued stirring for 0.5 h at room temperature. Quenched with water, solvent was evaporated; the residue was diluted with ethyl acetate, and then washed with saturated NaHCO3 solution, brine. The organic layer was dried (Na2SO4), filtered and concentrated under reduced pressure. The resultant residue was purified by column chromatography using 5% methanolic solution of ammonia (2.0 M ammonia in methanol) in DCM to get 3-butyl-4-(4-cyclohexyloxy-phenyl)-6-(4,4-difluoro-1-methyl-piperidin-3-ylmethoxy)-pyridazine (52 mg).

Workup

  1. customQuenched with water, solvent
  2. customwas evaporated
  3. additionthe residue was diluted with ethyl acetate
  4. washwashed with saturated NaHCO3 solution, brine
  5. dry with materialThe organic layer was dried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customThe resultant residue was purified by column chromatography

Sources & evidence

ORD record
ord-f3abb8a00af54d9ba0b8ac5a340377c4
Source dataset
uspto-grants-2014_06
Patent number
US08741900B2

Reaction notes

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