Synthese substituierter Cyclononatetraene |
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Authors: | Gabriele Sabbioni Markus Neuenschwander |
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Institution: | Institut für Organische Chemie der Universität Bern, Freiestrasse 3, CH–3012 Bern
Teil der Dissertation [2]. |
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Abstract: | Synthesis of Substituted Cyclononatetraenes In the course of an exploration of possible synthetic pathways to nonafulvenes, a series of 1-substituted cyclononatetraenes (CNT) 4b–1 have been prepared in yields of about 60%. Their structures follow from spectroscopic data as well as from the quantitative valence isomerisation to 1-endo-substituted cis-3a, 7a-dihydroindenes 8 . Both all-cis-CNT− 1 and cis,cis,cis,trans-CNT− 2 have been used as nucleophiles. Whereas 2 is normally more nucleophilic than 1 , the yield of cyclononatetraenes 4 prepared with 2 may be reduced due to by-products such as 9 and 10 . |
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