作者:Kristina Holzschneider、Andreas P. Häring、Alexander Haack、Daniel J. Corey、Thorsten Benter、Stefan F. Kirsch
DOI:10.1021/acs.joc.7b01019
日期:2017.8.4
acetates are converted into tetrazoles through the treatment with bases. The reaction of dichloro ketones with azide anions provides acyl azides, through in situ formation of diazido ketones. We present experimental and theoretical evidence that both fragmentations may involve the generation of acyl cyanideintermediates. The controlled degradation of terminal alkynes into amides (by loss of one carbon)
Synthesis of the 1,3,4-Oxadiazole Core through Thermolysis of Geminal Diazides
作者:Hellmuth Erhardt、Fabian Mohr、Stefan F. Kirsch
DOI:10.1002/ejoc.201601119
日期:2016.12
The thermolysis of geminal diazides derived from acylacetate compounds is an efficient tool for the rapid construction of the 1,3,4-oxadiazole core. While a broad range of ethyl esters undergoes smooth transformation to the desired heterocycles that contain the ester moiety in moderate to high yields, the analogous tert-butyl esters give rise to the oxadiazoles with acyl groups, presumably through