Journal
TETRAHEDRON LETTERS
Volume 53, Issue 27, Pages 3411-3415Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2012.03.093
Keywords
2-lsopropylidene-3-methylenecyclopropanes; Nitrones; Nitrile oxides; 3-Methylenepiperidin-4-ones; 2,3-Dihydro-3-methylenepyridin-4(1H)-ones,1,3-dipolar; cycloaddition
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The reactions of unactivated bis(methylene)cyclopropanes with nitrones and nitrile oxides have been investigated. The 1,1-diary1-2-isopropylidene-3-methylenecyclopropanes react with the C,N-diarylnitrones to give a mixture of 2,2-dimethy1-1,6-diary1-3-(diarylmethylene)piperidin-4-ones and 5-methyl-1aryl-1-(arylamino)-4-(diarylmethylene)hex-5-en-3-ones. 2,3-Dihydro-3-methylenepyridin-4(1H)-ones are obtained by reaction of 1,1-diary1-2-isopropylidene-3-methylenecyclopropanes with nitrile oxides. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
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