Dimethylformamide → (S)-4'-fluoro-7'-(2-fluoropyridin-3-yl)-2'-morpholino-5H-spiro[oxazole-4,9'-xanthen]-2-amine

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Reaction Conditions

Reaction Steps

A resealable vial was charged with (S)-2-amino-4′-fluoro-2′-morpholino-5H-spiro[oxazole-4,9′-xanthene]-7′-yl trifluoromethanesulfonate (125 mg, 0.248 mmol; prepared by steps analogous to those described in Method BB40 and Example 2), tetrakis(triphenylphosphine)palladium(0) (28.7 mg, 0.025 mmol), 2-fluoropyridin-3-ylboronic acid (56.0 mg, 0.397 mmol), DMF (1.2 mL) and 2 M aqueous sodium carbonate (372 μL, 0.745 mmol). The vial was sealed and the mixture was stirred for 2 hr at 85° C. The mixture was cooled and diluted with ethyl acetate (6 mL) and water (2 ml). The organic layer was loaded onto 2 g SCX column and washed with EtOAc and MeOH/DCM 1:1. The material was recovered from the column with 2 M ammonia in MeOH, concentrated and purified by silica gel chromatography using 15-60% DCM/MeOH/NH4OH 90:10:1 in DCM to give a solid that was sonicated with 2 mL of DCM, then filtered and dried to afford (S)-4′-fluoro-7′-(2-fluoropyridin-3-yl)-2′-morpholino-5H-spiro[oxazole-4,9′-xanthen]-2-amine MS m/z=451.0 [M+H]+. Chemical Formula: C24H20F2N4O3. Exact Mass: 450.15.

Provenance & Evidence