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Cobalt-catalyzed versus uncatalyzed intramolecular Diels-Alder cycloadditions

Abstract : The intramolecular [4+2] cycloadditions of dienynes was investigated using cobalt-based catalysts. Substrates without substitution on alkyne moiety were found to react under thermal activation. The use of a cobalt salt as catalyst made reactions cleaner by limiting the formation of byproducts. Cycloadditions with dienynes possessing a substituent on the alkyne pattern occurred only in presence of a cobalt catalyst which displayed a moderate to good activity depending on the substrate patterns.
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https://hal.archives-ouvertes.fr/hal-01768362
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Submitted on : Wednesday, April 18, 2018 - 9:44:43 PM
Last modification on : Tuesday, January 4, 2022 - 5:05:54 AM

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Bohdan Biletskyi, Alphonse Tenaglia, Hervé Clavier. Cobalt-catalyzed versus uncatalyzed intramolecular Diels-Alder cycloadditions. Tetrahedron Letters, Elsevier, 2018, 59 (2), pp.103 - 107. ⟨10.1016/j.tetlet.2017.11.052⟩. ⟨hal-01768362⟩

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