Fused heterocycles. Part 4. Synthesis and stereochemistry of hexahydrobenzo[6,7]cyclohepta[1,2-c]pyrazoles
Abstract
Hexahydrobenzo[6,7]cyclohepta[1,2-c]pyrazoles have been synthesized by treating 2-benzylidene-1-benzosuberone with hydrazine derivatives. The cis and trans isomers have been distinguished and conformational equilibria studied by NMR techniques.