ChemInform Abstract: Cyclopropane-Shift Type Reaction of Diaryl(2-halogenocyclopropyl)methanols Promoted by Lewis Acids.
Abstract
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ChemInform Abstract
A new, novel Lewis acid promoted cyclopropane-shift reaction of the cyclopropanes (I) and (V) is observed. Thus the reaction of (I) and (V) results in the formation of the tricyclic compounds (II), (VI) and (VII), which are transformed into the naphthalenes (IV) and arylindenes like (VIII), respectively. Alternatively, naphthalene derivatives (IV) are also prepared in a direct, one-pot cyclopropane-shift type benzannulation of (I). These reactions represent an interesting example of C-bond fission across a cation.
