Nitrogen → HCID 86696358, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of (3-bromo-imidazo[1,2-b]pyridazin-6-yl)-butyl-methyl-amine (377.7 mg, 1.3 mmol), 4-aminomethylphenylboronic acid hydrochloride [75705-21-4] (302.4 mg, 1.6 mmol), potassium phosphate tribasic monohydrate [27176-10-9] (612.7 mg, 2.7 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with dichloromethane [95464-05-4] (110.4 mg, 0.1 mmol) contained in a 25 mL round bottomed flask was added a solution of 30% (v/v) water in 1,2-dimethoxyethane (15 mL) and a magnetic stir bar. The reaction pot was fitted to a reflux condenser, lowered into an ambient temperature oil bath, and the system taken through 10 evacuation/N2 blanket cycles while being rapidly stirred. The rapidly stirred, N2 blanketed, reaction was heated to an oil bath temperature of 85° C. for 17 h then cooled and partitioned between brine (pH adjusted to 10 with 3N aqueous sodium hydroxide) and ethyl acetate. The phase separated extract was dried (CaSO4), evaporated and flash chromatographed (silica gel, eluted with 1% NH4OH in 10% (v/v) methanol/ethyl acetate) to isolate a brown solid which was triturated in heptane to precipitate a brown solid. Trituration solvent was then evaporated to provide [3-(4-aminomethyl-phenyl)-imidazo[1,2-b]pyridazin-6-yl]-butyl-methyl-amine as 41.8 mg white solid, mp. 99-101° C. 1H NMR (400 MHz, DMSO-d6) δ ppm 0.94 (t, J=7.33 Hz, 3H) 1.30-1.42 (m, 2H) 1.47-1.70 (m, 2H) 1.90 (br. s., 1H) 3.10 (s, 3H) 3.51-3.57 (m, 2H) 3.75 (s, 2H) 7.05 (d, J=9.85 Hz, 1H) 7.42 (d, J=8.34 Hz, 2H) 7.85 (d, J=10.11 Hz, 1H) 7.92 (s, 1H) 8.14 (d, J=8.34 Hz, 2H). LRMS (ESI) m/z 310.3 [(M+H)]+, calc'd for C18H23N6: 309.42.

Provenance & Evidence