申请人:IKEGUCHI Masahiko
公开号:US20120035372A1
公开(公告)日:2012-02-09
The present invention relates to a process of a process for producing a 2-halogeno-6-substituted-4-trifluoromethylpyridine. Specifically, the present invention provides a process for producing a 2-halogeno-6-substituted-4-trifluoromethylpyridine represented by the formula (I):
in which X is a chlorine atom, a bromine atom, or an iodine atom; R is alkyl, alkenyl, alkynyl, phenyl which may be substituted with A, benzyl which may be substituted with A, or cycloalkyl; and A is alkyl, alkoxy, a fluorine atom, or a chlorine atom,
which comprises allowing a 2,6-dihalogeno-4-trifluoromethylpyridine represented by the formula (II):
in which X is defined above,
and a Grignard reagent represented by the formula (III): RMgX, in which R and X are defined above, to react with each other in the presence of a solvent.
本发明涉及一种用于制备2-卤代-6-取代-4-三氟甲基吡啶的方法。具体而言,本发明提供了一种制备由式(I)表示的2-卤代-6-取代-4-三氟甲基吡啶的方法:其中X是氯原子、溴原子或碘原子;R是烷基、烯基、炔基、苯基(可能被A取代)、苄基(可能被A取代)或环烷基;A是烷基、烷氧基、氟原子或氯原子;所述方法包括允许由式(II)表示的2,6-二卤代-4-三氟甲基吡啶:其中X如上定义,和由式(III)表示的格氏试剂:RMgX,在溶剂存在下相互反应。