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Synthesis of bicyclo[2.2.1]heptane-2,3,5,6-tetracarboxylic 2,3:5,6-dianhydrides

✍ Scribed by Yamada, Masao; Kusama, Masatoshi; Matsumoto, Toshihiko; Kurosaki, Toshikazu


Book ID
126936537
Publisher
American Chemical Society
Year
1992
Tongue
English
Weight
407 KB
Volume
57
Category
Article
ISSN
0022-3263

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2,3,5,6-Tetramethylidene-Bicyclo[2.2.1]H
✍ André Florey; Pierre Vogel 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 German ⚖ 535 KB

## Abstract Preparation of the title compound 1 is described. An important transannular effect between the two unconjugated s‐cis‐butadiene chromophores is observed by comparison of the UV. spectra of the tetramethylidenenorbornane 1 and the dimethylidenenorbornane 3. The differences observed betwe