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Notiz zur Synthese des 3,7-Dicyan-1,5-dimethylsemibullvalens

✍ Scribed by Hüsing, Nicola ;Rothe, Wolfgang ;Kiefer, Wolfgang ;Quast, Helmut


Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
183 KB
Volume
1992
Category
Article
ISSN
0947-3440

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✦ Synopsis


Note of the Synthesis of 3,7‐Dicyano‐1,5‐dimethylsemibullvalene

The crystalline mixture of the tetrabromodinitriles 6 and 7, which is readily available in three steps from 1,5‐dimethylbicyclo[3.3.0]octane‐3,7‐dione, is reduced by the zinc‐copper couple in dry tetrahydrofuran in the presence of copper(I) chloride under ultrasonic radiation affording brominated semibullvalenes. Addition of water to the reaction mixture and resumption of the procedure eventually results in complete reduction producing the title compound 3a in good yield.


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