Premium
Metal‐Free Synthesis of 5‐Trifluoromethyl‐1,2,4‐Triazoles from Iodine‐Mediated Annulation of Trifluoroacetimidoyl Chlorides and Hydrazones
Author(s) -
Hu Sipei,
Yang Zuguang,
Chen Zhengkai,
Wu XiaoFeng
Publication year - 2019
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.201900983
Subject(s) - chemistry , annulation , intramolecular force , trifluoromethyl , iodine , intermolecular force , metal , combinatorial chemistry , medicinal chemistry , stereochemistry , organic chemistry , molecule , catalysis , alkyl
A metal‐free approach for the synthesis of 5‐trifluoromethyl‐1,2,4‐triazoles from trifluoroacetimidoyl chlorides and hydrazones has been achieved under aerobic oxidative conditions. The reaction proceeds through a cascade base‐promoted intermolecular C−N bond formation and iodine‐mediated intramolecular C−N bond oxidative coupling sequence. The protocol features broad substrate scope and can be scaled up to gram scale.