Studies on the syntheses of heterocyclic compounds. Part DXXVI. A novel synthesis of isopavine-type alkaloids. Total synthesis of (±)-reframidine
作者:Tetsuji Kametani、Shoji Hirata、Kunio Ogasawara
DOI:10.1039/p19730001466
日期:——
A new synthetic method for isopavine derivatives, through one-step ring opening and ring closure of an aziridinium intermediate, and its application to a totalsynthesis of (±)-reframidine (3), are described.
constitutes a variation and represents the first recorded “hydration” of a 1,2-dihydroisoquinoline to a 4-hydroxy-1,2,3,4-tetrahydroisoquinoline. The correct structure of remrefine is confirmed. Some speculations on the biosynthesis of pavine and isopavine alkaloids are also included.