211519-83-4Relevant academic research and scientific papers
Formation of acetylenic compounds and ring transformations of 3-alkyl-3-ferrocenylcyclopropenes in the reaction with 1,3-diphenylisobenzofuran
Klimova, Elena I.,Ramirez, Lena Ruiz,Esparza, Rafael Moreno,Berestneva, Tatiana Klimova,Garcia, Marcos Martinez,Meleshonkova, Natalya N.,Churakov, Andrei V.
, p. 1 - 10 (1998)
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 tBu-substituent are established by X-ray structural analysis. A possible reaction pathway via intermediate zwitter-ion is discussed.
