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Butler, RN,Gavin, HA,Moloney, EM,McArdle, P,Cunningham, D,Burke, LA
2006
August
Tetrahedron Letters
Spirally twisted imidazolium iminyl ylide structures from 1,2-rearrangements in reactions of imidazolium dicyanomethanide 1,3-dipoles with maleic anhydride: new perspectives on the Boekelheide-Fedoruk ring expansions
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DIPOLAROPHILES CYCLOADDITION
47
6107
6111
The reactions of 1-substituted-imidazolium-3-dicyanomethanides with maleic anhydride gave new ylide products from a Michael reaction and 1,2-rearrangements. These experiments, combined with theoretical calculations, provide an interesting new perspective on the Boekelheide-Fedoruk ring expansions. (c) 2006 Elsevier Ltd. All rights reserved.
DOI 10.1016/j.tetlet.2006.06.089
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