Synthesis and chemical transformations of diazolyl α,α-difluoroacetates
作者:Oleksandr V. Geraschenko、Vitalii V. Solomin、Bohdan V. Vashchenko、Pavlo Khodakivskyi、Andrey A. Tolmachev、Oleksandr O. Grygorenko
DOI:10.1016/j.jfluchem.2019.109407
日期:2020.1
Optimized protocols for the synthesis of diazolyl α,α-difluoroacetates via deoxofluorination of the corresponding glyoxylates with Morph-DAST are described. The method allowed the preparation of the title fluoridated building blocks in 73–96% yield on up to 15 g scale. Utility of the hetaryl α,α-difluoroacetates was demonstrated by the synthesis of advanced building blocks for medicinal chemistry,
Ethyl 2-azolylglyoxylates react smoothly with o-phenylenediamines and 1,2-diaminocyclohexane in acetonitrile at room temperature to give the corresponding 3-azolylquinoxalin-2(1H)-ones and their saturated analogues in good to excellent yields.