Abstract
A readily recycled and regenerated heterogeneous catalyst of 9-thiourea epi-quinine supported on mesoporous silica exhibits enhanced enantioselectivity (up to 99.2%) in the asymmetric Friedel-Crafts reaction of imines with indoles.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Catalysis
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Cinchona Alkaloids / chemistry*
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Imines / chemistry
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Indoles / chemistry
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Quinine / analogs & derivatives*
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Silicon Dioxide / chemistry*
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Stereoisomerism
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Thiourea / analogs & derivatives*
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Thiourea / chemistry
Substances
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Cinchona Alkaloids
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Imines
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Indoles
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Silicon Dioxide
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Quinine
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Thiourea