Formaldehyde → HCID 67372692, compound

HRID 402041Notes

Reaction equation

HRID 402041 reaction equation
[ClH:1].Cl.[CH2:3]([C:7]1[N:8]=[N:9][C:10]([O:32][CH:33]2[CH2:38][CH2:37][NH:36][CH2:35][CH2:34]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)=[C:15]([C:26]2[N:27]=[N:28][N:29]([CH3:31])[N:30]=2)[CH:14]=1)[CH2:4][CH2:5][CH3:6].C=O.O.[C:42](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(Cl)Cl.C(O)(=O)C>[ClH:1].[ClH:1].[CH2:3]([C:7]1[N:8]=[N:9][C:10]([O:32][CH:33]2[CH2:38][CH2:37][N:36]([CH3:42])[CH2:35][CH2:34]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)=[C:15]([C:26]2[N:27]=[N:28][N:29]([CH3:31])[N:30]=2)[CH:14]=1)[CH2:4][CH2:5][CH3:6]

Participants

7

Reactant 4

HCID 712FormaldehydeHCID 962WaterHCID 5049666Sodium triacetoxyborohydrideHCID 67373939HCID 67373939, compound

Product 1

HCID 67372692HCID 67372692, compoundYield 158.2%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidCatalystHCID 6344DichloromethaneSolvent

Procedure

To a solution of 3-butyl-4-[4-cyclohexyloxy-3-(2-methyl-2H-tetrazol-5-yl)-phenyl]-6-(piperidin-4-yloxy)-pyridazine dihydrochloride (0.09 mmol, 50.6 mg) in DCM (1 mL) was added formaldehyde solution in water (37%, 0.27 mmol, 0.020 mL) and 1 drop of acetic acid. Sodium triacetoxyborohydride (0.36 mmol, 80.3 mg, 95%) was added. The reaction mixture was stirred at room temperature for 1.5 h and partitioned between ethyl acetate (10 mL) and saturated aq. sodium bicarbonate solution (10 mL). The ethyl acetate layer was separated and dried over sodium sulfate. The crude product was purified by column chromatography on silica gel using 2 M ammonia in MeOH/DCM 1:19 to 1:14, dissolved in MeOH and treated with 4 N HCl in dioxane. The organic solvents were removed in vacuo and the residue was triturated with anhydrous diethyl ether. The light yellow solid was dried overnight under high vacuum to provide the title compound (41.2 mg). LCMS: m/z 508 [M+1] 1H NMR (400 MHz, CD3OD) δ 8.00 and 8.03 (1H, d), 7.77-7.86 (1H, m), 7.63-7.69 (1H, m), 7.39-7.43 (1H, m), 5.38-5.56 (1H, m), 4.65-4.68 (1H, m), 4.44 and 4.44 (3H, s), 3.13-3.69 (6H, m), 2.94 (3H, s), 1.29-2.58 (18H, m), 0.82 (3H, t).

Workup

  1. custompartitioned between ethyl acetate (10 mL) and saturated aq. sodium bicarbonate solution (10 mL)
  2. customThe ethyl acetate layer was separated
  3. dry with materialdried over sodium sulfate
  4. customThe crude product was purified by column chromatography on silica gel using 2 M ammonia in MeOH/DCM 1:19 to 1:14
  5. dissolutiondissolved in MeOH
  6. additiontreated with 4 N HCl in dioxane
  7. customThe organic solvents were removed in vacuo
  8. customthe residue was triturated with anhydrous diethyl ether
  9. customThe light yellow solid was dried overnight under high vacuum

Sources & evidence

ORD record
ord-7879fdbb24e6403187881ca8b6bb8347
Source dataset
uspto-grants-2014_06
Patent number
US08741900B2

Reaction notes

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