Formaldehyde → 1-{5-[3-Butyl-6-(1-methyl-piperidin-4-yloxy)-pyridazin-4-yl]-2-cyclohexyloxy-phenyl}-ethanone

HRID 402012Notes

Reaction equation

HRID 402012 reaction equation
Cl.Cl.[CH2:3]([C:7]1[N:8]=[N:9][C:10]([O:29][CH:30]2[CH2:35][CH2:34][NH:33][CH2:32][CH2:31]2)=[CH:11][C:12]=1[C:13]1[CH:14]=[CH:15][C:16]([O:22][CH:23]2[CH2:28][CH2:27][CH2:26][CH2:25][CH2:24]2)=[C:17]([C:19](=[O:21])[CH3:20])[CH:18]=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)=O.[Na+]>ClCCl.O.O.C(Cl)Cl.C(O)(=O)C>[CH2:3]([C:7]1[N:8]=[N:9][C:10]([O:29][CH:30]2[CH2:35][CH2:34][N:33]([CH3:38])[CH2:32][CH2:31]2)=[CH:11][C:12]=1[C:13]1[CH:14]=[CH:15][C:16]([O:22][CH:23]2[CH2:28][CH2:27][CH2:26][CH2:25][CH2:24]2)=[C:17]([C:19](=[O:21])[CH3:20])[CH:18]=1)[CH2:4][CH2:5][CH3:6]

Participants

9

Reactant 4

HCID 712FormaldehydeHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 673875181-{5-[3-Butyl-6-(piperidin-4-yloxy)-pyridazin-4-yl]-2-cyclohexyloxy-phenyl}-ethanone dihydrochloride

Product 1

HCID 584384271-{5-[3-Butyl-6-(1-methyl-piperidin-4-yloxy)-pyridazin-4-yl]-2-cyclohexyloxy-phenyl}-ethanoneYield 67.8%

Reagents, catalysts & solvents 4

HCID 176Acetic AcidSolventHCID 962WaterSolventHCID 6344DichloromethaneSolventHCID 21908982Water methylene chlorideSolvent

Procedure

To a solution of 1-{5-[3-butyl-6-(piperidin-4-yloxy)-pyridazin-4-yl]-2-cyclohexyloxy-phenyl}-ethanone dihydrochloride (50 mg, 0.095 mmol) in dichloromethane (2.0 mL) was added formaldehyde solution in water (37%, 0.2 mL), and 0.1 mL of acetic acid. Then sodium triacetoxyborohydride (200 mg) was added. And the mixture was stirred at room temperature for 10 min then condensed. It was then diluted with water/DCM, neutralized with sat NaHCO3 powder, organic layer was separated washed with water, brine and dried (Na2SO4). The solvent was removed in vacuo and the residue was purified by column chromatography using 5% methanolic solution of ammonia (2.0 M ammonia in methanol) in DCM to provide 1-{5-[3-Butyl-6-(1-methyl-piperidin-4-yloxy)-pyridazin-4-yl]-2-cyclohexyloxy-phenyl}-ethanone (30 mg). This compound was dissolved in DCM (2.0 mL) and 1.0 mL of 4.0 M HCl in dioxane was added. Solvents were evaporated resulting solid was washed with ether and dried to provide the title compound (33 mg). LCMS: m/z 467 [M+1]. 1H NMR (400 MHz, CD3OD) 7.94 (1H, s), 7.83-7.87 (1H, m), 7.68-7.74 (1H, m), 7.39 (1H, t), 5.35-5.43 (1H, m), 4.65-4.71 (1H, m), 3.65 (1H, d), 3.38-3.50 (2H, m), 3.28-3.30 (2H, m), 3.09-3.14 (2H, m), 2.84 (3H, s), 2.67 (3H, s), 2.5 (1H, d), 2.41 (1H, d), 2.24-2.31 (1H, m), 2.05-2.13 (2H, m), 1.80-1.84 (2H, m) 1.64-1.72 (3H, m), 1.51-1.56 (4H, m), 1.28-1.34 (3H, m), 0.83 (3H, t).

Workup

  1. customcondensed
  2. customwas separated
  3. washwashed with water, brine
  4. dry with materialdried (Na2SO4)
  5. customThe solvent was removed in vacuo
  6. customthe residue was purified by column chromatography

Sources & evidence

ORD record
ord-73850241715943989a2b64d249d2add5
Source dataset
uspto-grants-2014_06
Patent number
US08741900B2

Reaction notes

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