Domino Reactions of 4,5-Dicyanopyridazine with Dihydroheterocycles: Synthetic and Mechanistic Features
作者:Donatella Giomi、Marco Cecchi
DOI:10.1021/jo026761x
日期:2003.4.1
4-dihydro-2H-pyran (9) to give the tetracyclic skeletons 5-8 and the phthalonitrile 12 through the intermediates 4 and 10, respectively. A more complex mechanism was ascertained for the reaction of 1 with the pyrroline 14 which, under suitable conditions, afforded the bicyclic derivative 19 as the predominant product; selective elaborations of this species into the 5,6-dicyanoindoles 22 and 23 are reported.