申请人:ZHEJIANG ZHUJI UNITED CHEMICALS CO., LTD
公开号:US20170369412A1
公开(公告)日:2017-12-28
A preparative method for carboxylic acids is disclosed in the present invention. The method is characterized in that: compounds (II) are reacted in the presence of hydrogen peroxide and base to produce target products (I), as represented by the following reaction scheme: wherein R
1
is aryl, pyridyl, pyrimidyl, pyridazinyl, pyrazinyl, benzothienyl, benzofuranyl, quinolinyl, isoquinolinyl, thiadiazolyl, C
1-6
alkyl, C
3-6
cycloalkyl, C
2-6
alkenyl, C
2-6
alkynyl and hydrogen; R
2
is alkoxycarbonyl, alkylaminocarbonyl, aminocarbonyl, alkylthiolcarbonyl, cyano, sulfonyl, sulfinyl, carbonyl, aldehyde, carboxyl, nitro, alkyl and hydrogen; R
3
is alkoxycarbonyl, alkyl amido carbonyl, aminocarbonyl, cyano, sulfonyl, sulfinyl, carbonyl, carboxyl and nitro. The present invention has the following main benefits: cheap and readily available starting materials, safe processes, high yield, good quality, which facilitates industrial production.
本发明公开了一种羧酸的制备方法。该方法的特点在于:在过氧化氢和碱的存在下,化合物(II)发生反应,生成目标产物(I),如下面的反应方案所示:其中R1为芳基、吡啶基、嘧啶基、吡啶并嘧啶基、吡嗪基、苯并噻吩基、苯并呋喃基、喹啉基、异喹啉基、噻二唑基、C1-6烷基、C3-6环烷基、C2-6烯基、C2-6炔基和氢;R2为烷氧羰基、烷基氨基羰基、氨基羰基、烷基硫醇羰基、氰基、磺酰基、亚砜基、羰基、醛基、羧基、硝基、烷基和氢;R3为烷氧羰基、烷基酰胺羰基、氨基羰基、氰基、磺酰基、亚砜基、羰基、羧基和硝基。本发明具有以下主要优点:起始原料廉价且易得,工艺安全,产率高,质量好,有利于工业生产。