An Efficient Synthesis of Novel Fused Cycloheptatrienes through Mn(II)-Mediated Formal Intermolecular [2 + 2 + 2 + 1] Cycloaddition

A new method for
manganous acetate tetrahydrate mediated formal
intermolecular [2 + 2 + 2 + 1] cycloaddition was developed for the
synthesis of fused cycloheptatriene derivatives from N-(acylmethyl)­pyridinium iodides and naphtho­quinone. This
method provides an innovative route for the efficient and convenient
construction of fused seven-membered carbocycles from simple starting
materials.