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Updated: Sep 30, 2026

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
Novel [6 + 2] cycloaddition of fulvenes with alkenes: a facile synthesis of the anislactone and hirsutane framework
Bor-Cherng Hong1, Yeong-Jou Shr, Jian-Lin Wu
1Department of Chemistry, National Chung Cheng University, Chia-Yi, 621, Taiwan, ROC. chebch@ccunix.ccu.edu.cn
Abstract:
[reaction: see text] In contrast to the Diels-Alder reaction of fulvenes and various alkenes, 6-aminofulvenes react with maleic anhydride (or maleimide) to give [6 + 2] cycloaddition adducts, constituting an efficient and novel route to pentaleno[1,2-c]furan, pentaleno[1,2-c]pyrrole, and cyclopenta[a]pentalene skeleton.
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