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Highly β-selective epoxidation of the Δ5- and Δ4-unsaturated steroids catalyzed by the silica-supported polyhalogenated ruthenium porphyrin

Paper ID Volume ID Publish Year Pages File Format Full-Text
44622 46046 2006 6 PDF Available
Title
Highly β-selective epoxidation of the Δ5- and Δ4-unsaturated steroids catalyzed by the silica-supported polyhalogenated ruthenium porphyrin
Abstract

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.

Keywords
Ruthenium porphyrin; Supported; Unsaturated steroids; β-Selective epoxidation
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Highly β-selective epoxidation of the Δ5- and Δ4-unsaturated steroids catalyzed by the silica-supported polyhalogenated ruthenium porphyrin
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 301, Issue 2, 24 February 2006, Pages 176–181
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us