کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
67854 | 48496 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ionic liquids in methyltrioxorhenium catalyzed epoxidation–methanolysis of glycals under homogeneous and heterogeneous conditions Ionic liquids in methyltrioxorhenium catalyzed epoxidation–methanolysis of glycals under homogeneous and heterogeneous conditions](/preview/png/67854.png)
The efficient and high yielding domino epoxidation–methanolysis of glycals has been achieved under environment friendly conditions by oxidation with urea hydrogen peroxide adduct (UHP) and H2O2 in ionic liquids (ILs) catalyzed by methyltrioxorhenium and different heterogeneous methyltrioxorhenium derivatives. The facial diastereoselectivity of the oxidation ranged from satisfactory to excellent ones depending on the substrate and could be optimized by ample screening of catalysts. The oxidations performed with UHP proceeded with a higher degree of diastereoselectivity than those performed with H2O2. High yields of products and conversions of substrates were obtained under mild experimental conditions and by the use of simple work-up procedures.
The efficient and high yielding domino epoxidation–methanolysis of glycals has been achieved under environment friendly conditions by oxidation with UHP and H2O2 in ionic liquids (ILs) catalyzed by methyltrioxorhenium and different heterogeneous methyltrioxorhenium derivatives. Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 284, Issues 1–2, 2 April 2008, Pages 108–115