Synthesis of New Polyfluoroalkyl-Containing Pyrones, Pyridones and Pyrido[1,2-<i>a</i>]benzazoles from Fluorinated β-Alkoxyenones
作者:Igor Gerus、Günter Haufe、Nataliya Tolmachova、Sergey Vdovenko、Yuriy Kirzhner
DOI:10.1055/s-2007-990891
日期:2007.12
Fluorinated enones were reacted with thiazoles, imidazoles, benzimidazoles and benzthiazoles bearing methylene groups activated by electron-withdrawing substituents. The reactions start with a nucleophilic attack of the methylene carbon on the β-position of the enones. If the starting methylene compound contains a thi-azole ring, pyrones or pyridones were formed due to participation of the ester or
氟化烯酮与带有被吸电子取代基活化的亚甲基的噻唑、咪唑、苯并咪唑和苯并噻唑反应。反应以亚甲基碳对烯酮的 β 位的亲核攻击开始。如果起始亚甲基化合物含有噻唑环,则由于酯或腈基团的参与而形成吡喃酮或吡啶酮。在其他情况下,通过相应唑环的氮原子的参与获得咪唑-、苯并咪唑-或苯并噻唑-吡啶。除最终产品外,一些初级产品被分离或证明为中间体。