Serial [5+2]/[4+2] Cycloadditions: Facile, Preparative, Multi-Component Syntheses of Polycyclic Compounds from Simple, Readily Available Starting Materials This research was supported by grant CHE-9800445 from the National Science Foundation. The Stanford Graduate Fellowship (M.J.C.S. and G.G.G.) is gratefully acknowledged

Angew Chem Int Ed Engl. 2001 Oct 15;40(20):3895-3897.
No abstract available