Ultrasound-Assisted Synthesis of Isatin-Type 5'-(4-Alkyl/Aryl-1<i>H</i>-1,2,3-triazoles) via 1,3-Dipolar Cycloaddition Reactions
作者:Bianca N. M. Silva、Angelo C. Pinto、Fernando C. Silva、Vitor F. Ferreira、Bárbara V. Silva
DOI:10.5935/0103-5053.20160121
日期:——
This short report describes the preparation of twelve isatin derivatives, 5'-(4-alkyl/aryl-1H-1,2,3-triazoles), using 5-azido-spiro[1,3-dioxolane-2,3'-indol]-2'(1'H)-one in the presence of various alkynes under acidic conditions and ultrasound irradiation. Compared with conventional methods, yields increased to 78-98%, and reaction times decreased to 5 min. Besides time and energy saving, there was no need for purification of the product by column chromatography on silica gel, generating less waste and spent solvent.