Synthese von ‘Push-Pull’-Oligoacetylenen |
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Authors: | Andreas Bartlome Urs Stmpfli Markus Neuenschwander |
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Institution: | Andreas Bartlome,Urs Stämpfli,Markus Neuenschwander |
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Abstract: | Synthesis of ‘Push-Pull’-OligoAcetylenes ‘Push-pull’ triacetylenes 11a , b , c , as well as ‘push-pull’ tetraacetylene 13b have been prepared by reaction of the corresponding trichloroene(oligoinyl)amines 9 and 10 with 2 mol-equiv. of BuLi followed by acylation. The sequences (Schemes 3 and 4) are very simple and straightforward, they could in principle be applied to the synthesis of ‘push-pull’ pentaAcetylenes 15 and hexaacetylenes 17 (Scheme 5). Main limitations are the moderate yields as well as the low thermal stability of push-pull oligoacetylenes. |
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