Synthesis of novel piperidyl spirofused benzofurans/benzopyrans by radical cyclization
作者:Zilong Tang、Joelle Mayrargue、Mouad Alami
DOI:10.1002/jhet.630
日期:2011.11
Several new piperidyl spirofused benzofurans and piperidyl spirofused benzopyrans were synthesized via an intramolecular radical cyclization as the key step. It was found that the yield of the formation of five‐member ring was much higher than that of six‐member ring. In addition, the substituent attached to the benzene ring had almost no effect on the cyclization. J. Heterocyclic Chem.,(2011).
通过分子内自由基环化反应合成了几个新的哌啶基螺合苯并呋喃和哌啶基螺合苯并吡喃,这是关键步骤。发现五元环的生成产率比六元环的生成产率高得多。另外,连接在苯环上的取代基对环化几乎没有影响。J.杂环化学。,(2011)。