Isoxazole derivatives and process for producing the same

摘要

The present invention provides isoxazole derivatives represented by the following formula (I): (wherein R¹ represents a hydrogen atom, C₁-C₂₀ hydrocarbon group or -C(-O)OR^1a (wherein R^1a represents a C₁-C₁₀ alkyl group, etc.); R² and R³ represent a hydrogen atom, halogen atom, hydroxy group, C₁-C₂₀ alkyl group or C₆-C₂₀ aryl group, etc.; R⁴ represents a hydrogen atom, halogen atom, hydroxy group, cyano group, nitro group, amino group, C₁-C₂₀ hydrocarbon group, C₁-C₁₀ alkoxy group, C₁-C₁₀ acyl group, 5- to 7-membered heterocyclic group, etc.; R⁵ represents a hydrogen atom, halogen atom, hydroxy group, optionally substituted C₁-C₂₀ hydrocarbon group, C₁-C₂₀ alkoxy group, 5- to 7-membered heterocyclic group, etc.; and, n represents 0, 1, 2, 3 or 4), and a process of producing the same. The compounds are useful as intermediates for synthesis of pharmaceutical compounds, agricultural chemicals, dye compounds, etc. having the isoxazole skeleton.