The cyclopropanation of (2-X-ethyl)-substituted allenes with diazomethane in the presence of palladium acetate led to the formation of derivatives of methylenecyclopropane and spiropentane.The elimination of HX from the latter gave vinylspiropentane.
Zefirov, N. S.,Kozhushkov, S. I.,Kuznetsova, T. S.,Lukin, K. A.,Kazimirchik, I. V.
p. 605 - 610
(2007/10/02)
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