Synthesis of 1-Substituted Isoquinolines by Heterocyclization of TosMIC Derivatives: Total Synthesis of Cassiarin A.

A new method for the synthesis of 1-substituted isoquinolines by a heterocyclization that involves α-benzyl TosMIC derivatives and different electrophiles has been developed. This methodology has been successfully applied to a total synthesis of cassiarin A, an alkaloid with potent antiplasmodial activity against Plasmodium falciparum.