Nucleophilic substitution of hydrogen–the Boger reaction sequence as an approach towards 8-(pyridin-2-yl)coumarins
作者:Ramil F. Fatykhov、Maria I. Savchuk、Ekaterina S. Starnovskaya、Maria V. Bobkina、Dmitry S. Kopchuk、Emiliya V. Nosova、Grigory V. Zyryanov、Igor A. Khalymbadzha、Oleg N. Chupakhin、Valery N. Charushin、Viktor G. Kartsev
DOI:10.1016/j.mencom.2019.05.019
日期:2019.5
5,7-Dimethoxy-8-(3,6-diphenylpyridin-2-yl)coumarins were obtained from 5,7-dimethoxycoumarins and 3,6-diphenyl-1,2,4-triazines via the protocol comprising aromatic S N H substitution in the triazine ring followed by the Boger transformation of formed triazine moiety into the pyridine one. The advantages of the suggested method are simple procedures, high yields, and the absence of transition-metal
通过5,7-二甲氧基香豆素和3,6-二苯基-1,2,4-三嗪通过包含芳族SNH取代的方案从5,7-二甲氧基-8-(3,6-二苯基吡啶-2-基)香豆素中获得。三嗪环,然后将形成的三嗪部分进行Boger转化为吡啶基。所建议的方法的优点是操作简单,产率高并且不存在过渡金属催化剂。