Solvent-free synthesis of 5-(aryl/alkyl)amino-1,2,4-triazines and α-arylamino-2,2′-bipyridines with greener prospects
作者:Dmitry S. Kopchuk、Nikolay V. Chepchugov、Igor S. Kovalev、Sougata Santra、Matiur Rahman、Kousik Giri、Grigory V. Zyryanov、Adinath Majee、Valery N. Charushin、Oleg N. Chupakhin
DOI:10.1039/c6ra26305d
日期:——
A green and highly efficient method has been developed for the synthesis of 5-(aryl/alkyl)amino-1,2,4-triazines and α-arylamino-2,2′-bipyridines according to the principles of atom economy. It has been performed by two consecutive solvent-free reaction pathways: the ipso-substitution of a cyano-group in 5-cyano-1,2,4-triazines and the aza-Diels-Alder reaction of the resulting 5-arylamino-1,2,4-triazines
根据原子经济性的原理,已经开发出一种绿色且高效的方法来合成5-(芳基/烷基)氨基-1,2,4-三嗪和α-芳基氨基-2,2'-联吡啶。它是通过两个连续的无溶剂反应途径进行的:5-氰基1,2,4-三嗪中氰基的ipso取代和所得5-芳基氨基-1的aza-Diels-Alder反应带有2-吗啉代环戊烯的2,4-三嗪用作亲二烯体。该方法的显着优点是无溶剂和无催化剂条件,操作简便,与各种官能团的相容性,非色谱纯化技术和高收率。本方法具有低的E因子。