New and Facile Synthesis of Mono- and Bifunctional N-Substituted 4-Alkylidenequinolines by an Eschenmoser Approach
作者:Jocelyne Levillain、Michel Vazeux
DOI:10.1055/s-1995-3856
日期:1995.1
A new methodology based on the Eschenmoser coupling reaction has been developed for the preparation of quinoline anhydro bases. Its application has allowed the synthesis of 4-alkylidene-N-methylquinolines in two steps from N-methyl-4-quinolinethione (1) via appropriately 4-thiosubstituted quinolinium salts. Starting from 4(1H)-quinolinethione (6) itself, this process, combined with the Menschutkin reaction, is further demonstrated by the preparation of variously N-substituted 4-alkylidenequinolines. It is believed this route should provide access to pyridine and other quinoline anhydro bases.