Cesium carbonate → HCID 67983240, compound

Participants

Reaction Conditions

Reaction Steps

The amine, 4-((8-azabicyclo[3.2.1]octan-3-yloxy)methyl)-5-cyclopropyl-3-(2-(trifluoromethoxy)phenyl)isoxazole (41.5 mg, 0.102 mmol), dimethylacetamide (0.6 mL), methyl 3,4 difluorobenzoate (510 mg, 3.0 mmol), and cesium carbonate (108 mg, 0.33 mmol) were combined sequentially and heated to 100° C. for about 20 minutes and then 120° C. for approximately 1 hour. The mixture was diluted with ethyl acetate 20 mL and water washed (2×3 mL). The organics were dried under vacuum to a residue, the resulting residue was diluted with 3 mL of MeOH, and the liquid was directly purified using mass directed reverse phase HPLC under a gradient of 30 to 90% acetonitrile/water that was TFA modified (0.05%). The resulting product was cold vacuum concentrated and free based using an SPE polymer support cartridge and MeOH (5 mL) mobilizing solvent (product SPE PLHCO3 MP part no PL3540-C603). All resulting methanol effluent was concentrated to give the free based intermediate ester as a dense oil.

Provenance & Evidence