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Mayr, Herbert; Hellman, Werner and Lammers, Roswitha (1986): A carbocationic route to 3-substituted 1,4-cycloheptadienes. In: Tetrahedron, Vol. 42, No. 24: pp. 6663-6668 [PDF, 365kB]


The Lewis acid catalysed reaction of 5-chloro-1, 3-cycloheptadiene 4 with silyl enol ethers yields -cycloheptadienyl substituted carbonyl compounds in high yield. Since 4 is easily prepared from cycloheptatriene, and the cycloheptadienyl cation 3 is preferably attacked at 3-position, this reaction opens an efficient access to 3-substituted 1,4-cycloheptadienes.

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