反应详情

A 150-mL pressure vessel was charged with 2′-bromo-7′-hydroxyspiro[1,3-oxazole-4,9′-xanthen]-2-amine (845 mg, 2434 μmol) in THF (24 mL), pyrimidin-5-ylboronic acid (754 mg, 6085 μmol), tetrakis(triphenylphosphine)palladium(0) (281 mg, 243 μmol), and potassium carbonate (10.1 mL of a 1.2 M aqueous solution, 12.1 mmol). The vessel was sealed and placed in a 100° C. oil bath at for 4 h. The reaction mixture was cooled to RT and partitioned between EtOAc (50 mL) and water (50 mL). The aqueous layer was extracted with EtOAc (50 mL), and the combined organic extracts were dried over sodium sulfate, filtered, and evaporated. The crude material was purified by chromatography on silica gel (eluting with 30-100% of a 90:10:1 DCM/MeOH/NH4OH solution in DCM) to give 2′-hydroxy-7′-(5-pyrimidinyl)spiro[1,3-oxazole-4,9′-xanthen]-2-amine as an off-white solid.

1. customThe vessel was sealed
2. customplaced in a 100° C.
3. customat for 4 h
4. custompartitioned between EtOAc (50 mL) and water (50 mL)
5. extractionThe aqueous layer was extracted with EtOAc (50 mL)
6. dry with materialthe combined organic extracts were dried over sodium sulfate
7. filtrationfiltered
8. customevaporated
9. customThe crude material was purified by chromatography on silica gel (eluting with 30-100% of a 90:10:1 DCM/MeOH/NH4OH solution in DCM)