Metalloporphyrin Cr(TPP)Cl-catalyzed Claisen rearrangement of simple aliphatic allyl vinyl ethers and its unique stereoselectivity |
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| Authors: | Toshikatsu Takanami |
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| Affiliation: | Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan |
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| Abstract: | The catalytic Z-selective Claisen rearrangement of simple aliphatic allyl vinyl ethers can be achieved using a chromium(III) porphyrin complex, Cr(TPP)Cl, as a catalyst: Cr(TPP)Cl significantly enhances reversal of E-Z selectivity in the thermal Claisen rearrangement of allyl vinyl ethers, especially, 4,5- and 4,6-disubstituted derivatives, at low catalyst loading. |
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| Keywords: | Allyl vinyl ether Chromium(III) porphyrin complex Claisen rearrangement Lewis acid catalyst (Z)-γ,δ-unsaturated aldehyde |
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