Intermediates of structure:
wherein Y is CO₂R₁₀ or CH(R₁₂)CO₂R₁₀ in which R₁₀ is an ester protective group and R₁₀ is hydrogen, methyl, methoxy or fluoro, and their use for the preparation of leukotriene antagonists.
结构的中间体:
其中 Y 是 CO₂R₁₀ 或 CH(R₁₂)CO₂R₁₀,其中 R₁₀ 是酯保护基团,R₁₀ 是氢、甲基、甲氧基或
氟,以及它们在制备
白三烯拮抗剂中的用途。