CARBOXYLIC ACID PREPARATION METHOD

摘要

Disclosed is a carboxylic acid preparation method. The method is characterized in that: a compound (II) reacts in the presence of hydrogen peroxide and a base to produce a target product (I) represented by the following equation: R1 is aryl, pyridyl, pyrimidyl, pyridazinyl, pyrazinyl, benzothienyl, benzofuranyl, quinolinyl, isoquinolinyl, thiadiazolyl, C1-6 alkyl, C3-6 cycloalkyl, C2-6 alkenyl, C2-6 alkynyl and hydrogen; R2 is alkoxycarbonyl, alkylaminocarbonyl, aminocarbonyl, alkylthiolcarbonyl, cyan, sulfonyl, sulfinyl, carbonyl, aldehyde, carboxyl, nitro, alkyl and hydrogen; R3 is alkoxycarbonyl, alkyl amido carbonyl, aminocarbonyl, cyan, sulfonyl, sulfinyl, carbonyl, carboxyl and nitro. The present invention has the following main benefits: inexpensive and readily available starting materials, safe processes, high yield, high quality, and a facilitated industrial production.