Hydrochloric Acid → HCID 70817808, compound

Participants

Reaction Steps

To a mixture of tert-butyl (1-{4-[3-phenyl-6-methoxyimidazo[1,2-b]pyridazin-2-yl]phenyl}cyclobutyl)carbamate that was prepared in a manner analgous to that described for Intermediate Example Int-5 (550 mg, 1.17 mmol) in DCM (7.5 mL) and MeOH (0.8 mL) was added a 4 M hydrogen chloride solution in dioxane (5.8 mL, 23.4 mmol, 20.0 eq), and the resulting mixture was stirred at room temperature for 12 h. The resulting mixture was added to ice water, made alkaline with aqueous sodium hydroxide (2 N), and extracted with EtOAc (3×25 mL). The combined organic phases were washed, dried (Na2SO4 anh.) and concentrated under reduced pressure. The resulting material was purified using MPLC (Biotage Isolera; 100 g SNAP cartridge: 100% DCM 3.5 min., gradient to 95% DCM/5% MeOH 1 min., 95% DCM/5% MeOH 3.5 min., gradient to 90% DCM/10% MeOH 1 min., 90% DCM/10% MeOH 4.5 min.) to give 1-[4-(6-methyloxy-3-phenylimidazo[1,2-b]pyridazin-2-yl)phenyl]cyclobutanamine (379 mg, 83% yield):

Provenance & Evidence