High stereoselectivity on low temperature Diels-Alder reactions
We have found that some of the usually poor dienophiles (2-cycloenones) can undergo Diels-Alder reaction at -78°C with unusually high stereoselectivity in the presence of niobium pentachloride as a Lewis acid catalyst. A remarkable difference in reaction rates for unsubstituted and α- or β-methyl su...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Beilstein-Institut
2005-12-01
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| Series: | Beilstein Journal of Organic Chemistry |
| Online Access: | https://doi.org/10.1186/1860-5397-1-14 |