The present invention provides a method of industrially advantageously producing 7-oxabicyclo[2.2.1]hept-5-ene-2-carboxylic acid derivatives under mild conditions in a high yield. The present invention relates to a production method of a 7-oxabicyclo[2.2.1]hept-5-ene-2-carboxylic acid derivative of the formula (III) or the formula (IV), which comprises reacting an &agr;,&bgr;-unsaturated carboxylic acid of the formula (I) with a furan derivative of the formula (II) in the presence of a Lewis acid:
wherein each symbol is as defined in the specification.
本发明提供了一种在温和条件下高产地工业优势生产7-
氧代双环[2.2.1]庚-5-
烯-2-
羧酸衍
生物的方法。本发明涉及一种公式(III)或公式(IV)的7-
氧代双环[2.2.1]庚-5-
烯-2-
羧酸衍
生物的生产方法,包括在
路易斯酸的存在下,将公式(I)的α,β-不饱和
羧酸与公式(II)的
呋喃衍
生物反应:其中每个符号在说明书中定义。