Reduction by using SnCl2 of easily accessible 5-nitroisoxazoles substituted with an electron-withdrawing group (EWG) has been studied. Whereas the reaction in ethanol yielded 5-aminoisoxazoles, performing the reaction in tetrahydrofuran gave previously unknown 5-[hydroxy(tetrahydrofuran-2-yl)amino]isoxazoles. Both reduction procedures were optimized to afford the corresponding products in good to excellent yields. Some mechanistic details concerning the inclusion of the tetrahydrofuranyl moiety into the reaction product are discussed
Tick-borne flavivirus reproduction inhibitors based on isoxazole core linked with adamantane
作者:Dmitry A. Vasilenko、Evgenia V. Dueva、Liubov I. Kozlovskaya、Nikolay A. Zefirov、Yuri K. Grishin、Gennady M. Butov、Vladimir A. Palyulin、Tamara S. Kuznetsova、Galina G. Karganova、Olga N. Zefirova、Dmitry I. Osolodkin、Elena B. Averina
DOI:10.1016/j.bioorg.2019.03.028
日期:2019.6
Infections caused by flaviviruses pose a huge threat for public health all over the world. The search for therapeutically relevant compounds targeting tick-borne flaviviruses requires the exploration of novel chemotypes. In the present work a large series of novel polyfunctionalized isoxazole derivatives bearing substituents with various steric and electronic effects was obtained by our unique versatile