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A cyclobutanone to cyclobutane conversion has been performed on 7-methyl-7-vinylbicyclo[3.2.0]hept-2-en-6-one by low-temperature (25°C) Wolff-Kishner reduction of the hydrazone derivative. Upon heating, the exo-vinyl epimer affords predominantly cis-6-methyl-4,7,8,9-tetrahydroindene.
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Burkey et al. (1986) studied this question.
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