Summary
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1.
A suitable p~reparative method has been proposed for obtaining 2-methylcyclopentanone: it consists in the dehydration of the diol obtained b y oxidizing 1-methylcyclopentene with a mixture of hydrogen peroxide and formic acid.
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2.
It has been shown that this method is of no value for the preparation of 2-methylcyclohexanone: in the case of the six-membered cycle, dehydration of the diol is accompanied by isomerization side reaction.
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3.
1-Butyl-2-methyleyclopentane has been synthesized from 2-methylcyclopentanone prepared by the above method, and it has been separated into its cis and trans isomers.
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Plate, A.F., Liberman, A.L. & Momma, N.A. Preparation of 1,2=dialkylcycloalkanes synthesisis of the stereoisomeric 1-butyl-2-methylcyclopentanes. Russ Chem Bull 2, 617–623 (1953). https://doi.org/10.1007/BF01171783
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DOI: https://doi.org/10.1007/BF01171783