- A simple reduction of α-bromosulfones by cat.(PhSe)2/NaBH4
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Reduction of α-bromosulfones 1, 5, 13-16 by cat.(PhSe)2/NaBH4 occurred site-selectively in high yields. This reduction of 1,3- or 1,4-dibromobis(sulfone) 21 and 25 was applied to intramolecular coupling reactions to give the three- and four-membered carbocycles 26-28.
- Yoshimatsu, Mitsuhiro,Ohara, Megumi
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p. 5651 - 5654
(2007/10/03)
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- Acid-catalyzed Reactions of Aromatic Hydrocarbons with Alkanes and Cycloalkanes. X. Alkylations with Cyclohexane
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The complex reaction mixtures of the nonconventional alkylation of benzene with cyclohexane in the presence of Lewis/proton acids and promotors were investigated by gas-liquid chromatography and mass spectrometry.Four representative groups of hydrocarbons were found including cycloalkylbenzenes, substituted indanes or tetralines (C12H16), C1-C6-alkylbenzenes and isomeric biscycloalkyls (C12H22).Their formation is interpreted as a competition between alkylation, (without or with isomerization), ringfission with cycloalkylation or fragmentation, and self-alkylation; phenylcycloalkylcations and phenylalkylcations are the intermediates.
- Miethchen, Ralf,Steege, Sigrid,Kroeger, Carl-Friedrich
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p. 823 - 834
(2007/10/02)
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