- CATHODIC SYNTHESIS OF CYCLOBUTANES
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Cathodic electrolysis of compounds with an activated methylene group in the presence of 1,3-dibromopropane affords 1,1-disubstituted cyclobutanes.
- Vasil'ev, A. A.,Tatarinova, V. I.,Petrosyan, V. A.
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- CYCLOALKYLATION BY THE α,ω-DIBROMIDES OF COMPOUNDS CONTAINING AN ACTIVATED METHYLENE GROUP AS A METHOD FOR THE SYNTHESIS OF 1,1-DISUBSTITUTED CYCLOALKENES
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A convenient preparative method was developed for the cycloalkylation of active methylene compounds, including β-diketones, by the dibromides BrCH2(CH2)nCH2Br (n = 0,1,2) in the presence of an excess of potassium carbonate in DMSO.The reaction gives high yields for the dibromides with n = 0 and 2, whereas the formation of cyclobutanes (n=1) is complicated by O,C-alkylation.The 1-substituted 1-acylcyclopropanes undergo thermal isomerization to the corresponding dihydrofuranes.
- Zefirov, N. S.,Kuznetsova, T. S.,Kozhushkov, S. I.,Surmina, L. S.,Rashchupkina, Z. A.
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p. 474 - 480
(2007/10/02)
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