Combining the [2,3] sigmatropic rearrangement and ring-closing metathesis strategies for the synthesis of spirocyclic alkaloids. A short and efficient route to (±)-perhydrohistrionicotoxin

Article abstract of DOI:10.1016/S0040-4020(98)01115-6

This paper describes the use of selenium-based [2,3] sigmatropic rearrangement in combination with ruthenium-catalyzed ring-closing metathesis (RCM) for the synthesis of azaspiro ring systems, as exemplified by the reactions of model substrates 5 and 6. T