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.
The Vinylogous Mannich Reaction: An Efficient Access to Substituted Nicotinonitriles
作者:Nikolaus Risch、Andreas Winter
DOI:10.1055/s-2003-42044
日期:——
A straightforward method for the preparation of substituted nicotinonitriles has been developed. Starting from conjugated β-enaminonitriles and iminium salts, this methodology establishes a convenient access to 6-aryl- (5), 6-amino- (16) and 6-carboxylic ester-substituted derivatives 14 and as well to acetic acid-substituted pyrroles 12.