A new rearrangement of fused tetracyclic heterocycles in an acidic medium in the presence of NaBH3CN

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Authors	PÍŽOVÁ Hana MAREK Radek MAN Stanislav TARABA Jan POTÁČEK Milan
Year of publication	2006
Type	Article in Periodical
Magazine / Source	Tetrahedron Letters
MU Faculty or unit	Faculty of Science
Citation
Field	Organic chemistry
Keywords	rearrangement; fused heterocycles; sodium cyanoborohydride; acidic medium
Description	In acidic medium the criss-cross cycloadduct with four fused five-membered rings rearranges to a heterocyclic compound 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.
Related projects:	Structure and character of bonding, properties and analysis of synthetic and natural molecular ensembles