Urea–Hydrogen Peroxide Complex: A Selective Oxidant in the Synthesis of 2-Phenylselenyl-1,3-butadienes
摘要:
2-Phenylselenyl-1,3-butadienes were synthesized via the selective oxidation of 2,4-diphenylselenyl-1-butenes with urea-hydrogen peroxide followed by the selenoxide elimination.
Copper(II) Acetate Mediated Reactions of Methylenecyclopropane and Diphenyl Diselenide
作者:Xian Huang、Lei Yu
DOI:10.1055/s-2007-980361
日期:2007.6
Phenylselenyl-substituted cyclobutenes and 1,3-butadienes were obtained from a copper(II) acetate mediated reaction between methylenecyclopropanes and diphenyl diselenide.
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.