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2,3,5,6-Tetramethylidene-Bicyclo[2.2.1]Heptane (Preliminary Communication)

✍ Scribed by André Florey; Pierre Vogel

Publisher
John Wiley and Sons
Year
1975
Tongue
German
Weight
535 KB
Volume
58
Category
Article
ISSN
0018-019X

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✦ Synopsis

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 between the UV. spectra of 2,3,5,6‐tetramethylidene‐7‐oxanorbornane 2 and 1 are also discussed briefly.

📜 SIMILAR VOLUMES

Synthesis and Diels-Alder Reactivity of
Synthesis and Diels-Alder Reactivity of 1-(Dimethoxy)methyl-2,3,5,6-tetramethylidene-7-oxabicyclo[2.2.1]heptane. Preliminary communication
✍ Jean-Luc Métral; Pierre Vogel 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 German ⚖ 221 KB 👁 1 views

## Abstract A short synthesis of the title compound **13** is reported. The acetal group in **13** enables one to control the regio‐ and stereoselectivity of the two successive __Diels__‐__Alder__ additions of the tetraene. The first addition is significantly faster than the second one, thus making

Tétraméthylidène-2, 3, 5, 6-oxa-7-bicycl
Tétraméthylidène-2, 3, 5, 6-oxa-7-bicyclo[2.2.1]heptane. (Communication préliminaire)
✍ Pierre Vogel; André Florey 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 German ⚖ 265 KB

## Abstract Preparation of the title compound (**4**) is described. An important transannular effect between the two unconjugated __s‐cis__‐butadiene chromophores is observed by comparison of the UV. spectra of the dimethylidene‐oxanorbornane **3** and the tetramethylidene‐oxanor‐bornane **4**.

Pyrolyse du Diméthylidène-2, 3-oxa-7-bic
Pyrolyse du Diméthylidène-2, 3-oxa-7-bicyclo[2.2.1]heptane
✍ Pierre Vogel; Michèle Hardy 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 German ⚖ 255 KB

## Abstract Benzocyclobutene **10** and 3‐oxabicyclo [3.2.0]hepta‐1, 4‐diene **11** are formed by gas‐phase pyrolysis of the title compound **9**. The results are discussed with reference to the estimated reaction parameters. It is found that the activation due to oxygen in **9** is relatively weak