Synthesis of Fréchet-type dendritic homotriptycenes

• 来源期刊: 中国科学B辑(英文版)
• 年，卷（期）: 2009,（7）
• 页码范围: 1051-1056
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11426-009-0088-x

摘要

A rapid and efficient synthesis of novel dendrimer homotriptycenes is presented.The dendronized 9,10-dihydroanthracen-9-ols 4,having high electron densities in the benzene rings of the Fréchet-type dendrons,exhibited in the presence of acid a quantitative transannular ring closure to the corresponding dendritic homotriptycenes.The electron-donating Fréchet-type dendrons enabled the intramolecular FC alkylation by a regioselective 1,7-elimination of H2O.