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“Concerted” Transition State, Stepwise Mechanism. Dynamics Effects in C 2- C 6 Enyne Allene Cyclizations

✍ Scribed by Bekele, Tefsit; Christian, Chad F.; Lipton, Mark A.; Singleton, Daniel A.


Book ID
121409345
Publisher
American Chemical Society
Year
2005
Tongue
English
Weight
251 KB
Volume
127
Category
Article
ISSN
0002-7863

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Ring Strain Effects in Enyne-Allene Ther
✍ Michael Schmittel; Jens-Peter Steffen; Dominik Auer; Michael Maywald 📂 Article 📅 1997 🏛 Elsevier Science 🌐 French ⚖ 485 KB

The mode of the thermal cyclization of enyne-allenes 1 depends on ring strain effects: when the ene functionality is part of a benzene, cyclohexene or cycloheptene ring the novel C2-C6biradicrd cyclization is observed, while when it is part of a cyclopentene ring the Myers-Saito cycloaromatization i