Synthesis and 20π-electrocyclisation of heptahendecafulvadiene - An unusual sequence of pericyclic processes |
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| Authors: | Andreas Beck Lothar Knothe Dieter Hunkler Horst Prinzbach |
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| Affiliation: | Chemisches Laboratorium der Universität, 7800 Freiburg i. Br., BRD Germany |
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| Abstract: | Upon thermal activation the newly synthesised heptahendecafulvadiene E ( 3) is isomerised into the pentacyclic hydrocarbons 9/11 (xylene,t1/2(150°C) ca.5min), the formation of which is explained by initial conrotatory 20-electron electrocyclisation followed by a cascade of 10π/6π-pericyclic processes. |
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