Author/Authors :
Zachov?، نويسنده , , Hana and Marek، نويسنده , , Radek and Man، نويسنده , , Stanislav and Taraba، نويسنده , , Jan and Pot??ek، نويسنده , , Milan، نويسنده ,
Abstract :
In an acidic medium the criss-cross cycloadduct 2 with four fused five-membered rings rearranges to a heterocyclic compound 3 with a completely different structure consisting of two six-membered and two five-membered rings. This newly discovered rearrangement was observed in the presence of a reducing agent (NaBH3CN). The rearrangement proceeds easily and with an extremely high yield.
