Formation of acetylenic compounds and ring transformations of 3-alkyl-3-ferrocenylcyclopropenes in the reaction with 1,3-diphenylisobenzofuranстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The reaction of 3-ferrocenyl-3-methylcyclopropene with 1,3-diphenylisobenzofuran leads to the formation of exo- and endo -1,4-epoxy-2-ethynyl-2-ferrocenyl-1,4-diphenyltetralines as the main products in addition to the isomeric Diels - Alder exo-adducts. At the same time, 3-tert-butyl- and 3-(1-adamantyl)-3-ferrocenylcyclopropenes form the endo- and exo-adducts of 3-alkyl-1,2-(1-propene-1,3-diyl)ferrocene. The structures of the acetylenic compounds and of the adduct containing a Bu-t-substituent are established by X-ray structural analysis. A possible reaction pathway via intermediate zwitter-ion is discussed. (C) 1998 Elsevier Science S.A. All rights reserved.