Microwave-assisted synthesis of sterically hindered 3-(5-tetrazolyl)pyridines
作者:Igor V. Bliznets、Andrei A. Vasil’ev、Sergey V. Shorshnev、Aleksandr E. Stepanov、Sergey M. Lukyanov
DOI:10.1016/j.tetlet.2004.01.153
日期:2004.3
Stericallyhindered 2,4-disubstituted 3-(5-tetrazolyl)pyridines were efficiently prepared from the corresponding nicotinonitriles using microwave technology.
A Simple and Versatile Route to Novel Conjugated <i>β</i>-Enaminonitriles and Their Application for the Highly Regioselective Synthesis of Nicotinonitriles Using a Vilsmeier-Type Reagent
作者:Alan R. Katritzky、Anna Denisenko、Michael Arend
DOI:10.1021/jo990313g
日期:1999.8.1
A straightforward synthesis of conjugated beta-enaminonitriles from ketones and beta-aminocrotononitrile mediated by TiCl4 is described. The reaction of these novel dienamines with a Vilsmeier-type reagent provides a mild and highly regioselective route for the preparation of nicotinonitriles.