Formaldehyde → HCID 58438351, compound

Participants

Reaction Steps

To a solution of 3-cyclobutyl-4-(4-cyclohexyloxy-phenyl)-6-(piperidin-4-yloxy)-pyridazine dihydrochloride (0.17 mmol, 0.08 g) and aqueous formaldehyde (37%, 0.83 mmol, 0.07 mL) in dry DCM (1 mL) was added macroporous resin-bound triacetoxyborohydride (loading 2.36 mmol/gram, 1.0 mmol, 0.42 g). The mixture was shaken for 12 hours. The reaction was placed directly onto a 4 g SiO2 cartridge and the column was eluted with 0-6% (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 (1 mL) and DCM (1 mL). The volatiles were removed under reduced pressure and the salt was triturated with diethyl ether and filtered to provide the title compound (0.05 g). LCMS: m/z 423 [M+1]. 1H NMR (400 MHz, CD3OD) δ 7.26-7.47 (3 H, m), 7.02-7.11 (2 H, m), 5.35-5.60 (1 H, m), 4.37-4.48 (1 H, m), 3.97-4.13 (1 H, m), 3.67 (1 H, d), 3.23-3.53 (2 H, m), 2.92 (3 H, s), 1.95-2.62 (12 H, m), 1.75-1.92 (3 H, m), 1.29-1.68 (6 H, m).

Provenance & Evidence