The reaction of aliphatic ketones with aliphatic or aromatic nitriles in the presence of trifluoromethanesulfonic anhydride has been shown to be a very useful method for the preparation of alkyl- and aryl-pirimidines. The reaction shows a high degree of regioselectivity that depends on the characteristics of the residues attached at the carbonyl group. The results from different branched symmetric
Strategy for the Synthesis of Pyrimidine Derivatives: NbCl<sub>5</sub>-Mediated Cycloaddition of Alkynes and Nitriles
作者:Yasushi Satoh、Kaoru Yasuda、Yasushi Obora
DOI:10.1021/om300669s
日期:2012.8.13
Intermolecular cycloadditions of alkynes (terminal alkynes and internal alkynes) with aryl nitriles were successfully achieved, using an NbCl5 complex, to give substituted pyrimidine derivatives in high yields with excellent chemo- and regioselectivity.