کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
44622 | 46046 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly β-selective epoxidation of the Δ5- and Δ4-unsaturated steroids catalyzed by the silica-supported polyhalogenated ruthenium porphyrin
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Highly β-selective epoxidation of the Δ5- and Δ4-unsaturated steroids catalyzed by the silica-supported polyhalogenated ruthenium porphyrin Highly β-selective epoxidation of the Δ5- and Δ4-unsaturated steroids catalyzed by the silica-supported polyhalogenated ruthenium porphyrin](/preview/png/44622.png)
چکیده انگلیسی
The ruthenium(II) 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin carbonyl complex has been covalently attached to a 3-aminoporpyl functionalized silica gel. This supported complex is found to efficiently catalyze the epoxidation of the Δ5-unsaturated steroid derivatives with high conversion, epoxide yield and β-selectivity. High β-selectivity is also observed for the epoxidation of a Δ4-unsaturated steroid though the conversion and derivative are low. This new silica-supported polyhalogenated metalloporphrin catalyst can be easily recovered after reaction and has shown high stability over repeated uses. No catalyst leaching is detected in these reactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 301, Issue 2, 24 February 2006, Pages 176–181
Journal: Applied Catalysis A: General - Volume 301, Issue 2, 24 February 2006, Pages 176–181
نویسندگان
Yuan-Cong Zhao, Yong-Ze Xiang, Lin Pu, Meng Yang, Xiao-Qi Yu,