HCID 86716522, compound → HCID 70817844, compound

Participants

Reaction Steps

To a mixture of methyl (2E)-3-[6-bromo-2-(4-{1-[(tert-butoxycarbonyl)amino]cyclobutyl}phenyl)-3-phenylimidazo[1,2-b]pyridazin-8-yl]acrylate that was prepared in a manner analgous to that described for Example 72, Step 1 (0.50 g, 0.83 mmol) and 10% palladium on carbon (0.26 g) in a mixture of ethanol (14 mL) and THF (5 mL) was placed under a hydrogen atmosphere at room temperature for 1 h. The resulting mixture was treated with additional 10% palladium on carbon (0.26 g) and placed under a hydrogen atmosphere for 1 h. Solids were removed by filtration and washed with ethanol (20 mL). The combined organic solutions were treated with 10% palladium on carbon (0.26 g) and placed under a hydrogen atmosphere for 1 h. Solids were removed by filtration and washed with ethanol (20 mL). The combined organic solutions were concentrated under reduced pressure. The resulting material was purified using MPLC (Biotage Isolera; Snap 25 g cartridge, 100% hexane 2.0 min, gradient to 80% hexane/20% EtOAc 1.5 min, gradient to 74% hexane/26% EtOAc 2.5 min, gradient to 70% hexane/30% EtOAc 2.0 min, gradient to 50% hexane/50% EtOAc 3.0 min, 50% hexane/50% EtOAc 6.4 min, gradient to 25% hexane/75% EtOAc 3.5 min, 25% hexane/75% EtOAc 5.3 min gradient to 100% EtOAc 5.3 min, 100% EtOAc 21.2 min). The resulting material was further purified using preparative HPLC (Agilent Prep 1200 equipped with 2× Prep Pump, DLA, MWD, ELSD and Prep FC using an XBrigde C18 5 μm 100×30 mm column; gradient from 100% water with 0.1% HCO2H to 70% water with 0.1% HCO2H/30% MeOH over 1.0 min, gradient to 30% water with 0.1% HCO2H/70% MeOH over 7.0 min, gradient to 100% MeOH over 0.1 min, 100% MeOH 1.9 min) to give methyl 3-{2-[4-(1-aminocyclobutyl)phenyl]-3-phenylimidazo[1,2-b]pyridazin-8-yl}propanoate (0.003 g, 1%):

Provenance & Evidence