Potassium tert-Butoxide Promoted Synthesis of 4,5-Diaryl-2H-1,2,3-triazoles from Tosylhydrazones and Nitriles
作者:Luyong Wu、Shanguang Qiu、Yuxue Chen、Xinming Song、Li Liu、Xi Liu
DOI:10.1055/s-0040-1707321
日期:2021.1
Intermolecular cycloaddition of tosylhydrazones with nitriles was investigated. t-BuOK was shown to be an excellent base for increasing the effectiveness of the reaction in this protocol, and homocoupling of the tosylhydrazones was significantly inhibited by using xylene as a solvent. Through this transformation, a variety of 4,5-diaryl-2H-1,2,3-triazoles were prepared in good to excellent yields and
Photochemical azido ligand transfer reaction of a triarylbismuth diazide with alkynes
作者:Hitomi Suzuki、Chie Nakaya、Yoshihiro Matano
DOI:10.1016/s0040-4039(00)77490-9
日期:1993.2
Irradiation of a triarylbismuth diazide in benzene in the presence of alkynes results in the transfer of one of the azido ligands to the triple bond, leading to N-unsubstituted 1,2,3-triazoles in fair to moderate yields.
Preparations of N- and P-substituted acetylenes under metal-free conditions
作者:Hong Chen、Qingjuan Zheng、Wanrong Dong、Zhihong Peng、Delie An
DOI:10.1080/00397911.2016.1198812
日期:2016.9.1
ABSTRACT An efficient strategy towards triazole- or phosphine-oxide-substituted alkynes with the assistance of strong base LiHMDS is described. The facile and practical reaction took place from easily prepared substrates in a one-pot manner without participation of any transition metal catalysts or ligands, exhibiting good functional groups tolerance (up to 37 examples) and high efficiency (up to 90%