Formaldehyde → HCID 58438351, compound

HRID 401985Notes

Reaction equation

HRID 401985 reaction equation
Cl.Cl.[CH:3]1([C:9]2[N:10]=[N:11][C:12]([O:28][CH:29]3[CH2:34][CH2:33][NH:32][CH2:31][CH2:30]3)=[CH:13][C:14]=2[C:15]2[CH:20]=[CH:19][C:18]([O:21][CH:22]3[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]3)=[CH:17][CH:16]=2)[CH2:8][CH2:7][CH2:6][CH2:5][CH2:4]1.C=O.[C:37](O[BH-](OC(=O)C)OC(=O)C)(=O)C>C(Cl)Cl>[CH:3]1([C:9]2[N:10]=[N:11][C:12]([O:28][CH:29]3[CH2:30][CH2:31][N:32]([CH3:37])[CH2:33][CH2:34]3)=[CH:13][C:14]=2[C:15]2[CH:20]=[CH:19][C:18]([O:21][CH:22]3[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]3)=[CH:17][CH:16]=2)[CH2:4][CH2:5][CH2:6][CH2:7][CH2:8]1

Participants

5

Reactant 3

HCID 712FormaldehydeHCID 2724942TriacetoxyborohydrideHCID 67373525HCID 67373525, compound

Product 1

HCID 58438351HCID 58438351, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 3-cyclohexyl-4-(4-cyclohexyloxy-phenyl)-6-(piperidin-4-yloxy)-pyridazine dihydrochloride (0.079 mmol, 0.04 g) and aqueous formaldehyde (37%, 0.39 mmol, 0.035 mL) in dry DCM (1 mL) was added macroporous resin-bound triacetoxyborohydride (loading 2.36 mmol/gram, 0.47 mmol, 0.20 g). The mixture was shaken for 2 hours. The reaction was placed directly onto a 4 g SiO2 cartridge and the column was eluted with 4-6% (2N NH3 in MeOH) in DCM to give 3-cyclohexyl-4-(4-cyclohexyloxy-phenyl)-6-(1-methyl-piperidin-4-yloxy)-pyridazine. The neutral amine was treated with 2N HCl in diethyl ether (0.5 mL) and DCM (0.5 mL). The volatiles were removed under reduced pressure and the salt was triturated with diethyl ether and filtered to provide the title compound (0.04 g). LCMS: m/z 451 [M+1]. 1H NMR (400 MHz, CD3OD) δ 7.63-7.79 (1H, m), 7.38-7.43 (2H, m), 7.10-7.14 (2H, m), 5.33-5.57 (1H, m), 4.40-4.51 (1H, m), 3.66-3.69 (1H, m), 3.11-3.54 (3H, m), 2.94 (3H, s), 2.37-2.62 (2H, m), 2.20-2.30 (1H, m), 1.20-2.17 (22H, m).

Workup

  1. washthe column was eluted with 4-6% (2N NH3 in MeOH) in DCM

Sources & evidence

ORD record
ord-952f7f0be6a043f19dc2c40d2045f8ed
Source dataset
uspto-grants-2014_06
Patent number
US08741900B2

Reaction notes

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