Iron salt, a cheap, highly efficient and environment-friendly metal catalyst for Se–Se bond cleavage and the further reaction with methylenecyclopropanes under mild conditions
摘要:
FeCl3 was found to be a good catalyst in Se-Se bond cleavage. Further electrophilic additions to methylenecyclopropanes provide a convenient access to diphenylselenylcyclobutanes. Comparing with other Lewis acids, FeCl3 is much cheaper and the reaction conditions are milde and more tolerance to air and moisture. (C) 2010 Elsevier B.V. All rights reserved.
Lewis Acid Catalyzed Reaction of Methylenecyclopropanes with 1,2-Diphenyldiselane or 1,2-Di-<i>p</i>-tolyldisulfane
作者:Lei Yu、Jundong Meng、Ling Xia、Rong Guo
DOI:10.1021/jo9006514
日期:2009.7.17
Catalyzed by Lewis acid, 1,2-diphenyldiselane or 1,2-di-p-tolyldisulfane could add to methylenecyclopropanes smoothly. Compared with the reported free radical additions, the results were quite different. A four-membered carbon ring was constructed to give cyclobutane-1,1-diylbis(phenylselane) derivatives or cyclobutane-1,1-diylbis(p-tolylsulfane) derivatives as products, which are useful intermediates in organic synthesis.
Iron salt, a cheap, highly efficient and environment-friendly metal catalyst for Se–Se bond cleavage and the further reaction with methylenecyclopropanes under mild conditions
FeCl3 was found to be a good catalyst in Se-Se bond cleavage. Further electrophilic additions to methylenecyclopropanes provide a convenient access to diphenylselenylcyclobutanes. Comparing with other Lewis acids, FeCl3 is much cheaper and the reaction conditions are milde and more tolerance to air and moisture. (C) 2010 Elsevier B.V. All rights reserved.