ChemInform Abstract: Novel Pentacyclic π-Conjugated Cations Containing Both Heteroaromatic Units and a Tropylium Ion. Part 2. Synthesis of Cyclohepta(a)benzofuro(c)naphthalenylium and Cyclohepta(a)benzothieno( c)naphthalenylium Ions.
✍ Scribed by K. YAMAMURA; T. YAMANE; H. TAKAGI; H. MIYAKE
- Book ID
- 101850715
- Publisher
- John Wiley and Sons
- Year
- 2010
- Weight
- 30 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0931-7597
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✦ Synopsis
Novel Pentacyclic π-Conjugated Cations Containing Both Heteroaromatic Units and a Tropylium Ion. Part 2. Synthesis of Cyclohepta(a)benzofuro(c)naphthalenylium and Cyclohepta(a)benzothieno( c)naphthalenylium Ions.
-The novel pentacyclic systems (I) and (II), possessing both electron-rich and electrondeficient aromatic rings, are synthesized by an intramolecular Friedel-Crafts type reaction as the key step. Although the intermolecular electrophilic addition of the tropylium ion to electron-rich aromatic compounds is well-known, such intramolecular Friedel-Crafts type reaction is very rare. -(YAMAMURA, K.;