A new synthesis of the tricyclic [10]annulene 7b-methyl-7bH-cyclopent [cd]indene
Abstract
In a new versatile synthesis of the tricyclic [10]annulene, 7b-methyl-7bH-cyclopent[cd]indene, the third ring is formed by an intramolecular aldol condensation rather than a cycloaddition reaction.