4,6-dihydroxy-2-methyl-2,4,6-trifluoromethyl-tetrahydropyran-4-acrylic acid ester 在
bis(2-methoxyethyl)-aminosulfur trifluoride 作用下,
以
乙醚 为溶剂,
反应 1.0h,
以78%的产率得到6-fluoro-4-hydroxy-2-methyl-2,4,6-tris(trifluoromethyl)-tetrahydropyran 4-acrylic acid ester