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
作者:Richard N. Butler、Helena A. Gavin、Eamon M. Moloney、Patick McArdle、Desmond Cunningham、Luke A. Burke
DOI:10.1016/j.tetlet.2006.06.089
日期:2006.8
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.