Potassium tert-Butoxide Promoted Cycloaddition Reaction for the Synthesis of 1,5-Disubstituted 1,2,3-Triazoles from Aromatic Azides and Trimethylsilyl-Protected Alkynes
作者:Luyong Wu、Yuxue Chen、Mi Tang、Xinming Song、Guangying Chen、Xiaoping Song、Qiang Lin
DOI:10.1055/s-0031-1291042
日期:2012.6
cycloaddition reaction of aromatic azides and trimethylsilyl alkynes upon treatment with desilylating reagents was investigated. In the process, the use of t-BuOK in wet DMF generated 1,5-disubstituted1,2,3-triazoles regioselectively in moderate to good yields at ambient temperature.
A copper-catalyzed decarboxylative regioselective protocol for the synthesis of 1,5-disubstituted 1,2,3-triazoles through direct annulation of cinnamic acids with aryl azides has been developed. This is the first example of 1,5-disubstituted 1,2,3-triazoles, under aerobic conditions using Cu(II) as the catalyst, which were generally synthesized using a ruthenium(II) catalyst. The simplicity and regioselectivity