Coupling Reaction of Zirconacyclopentadienes with Dihalonaphthalenes and Dihalopyridines: A New Procedure for the Preparation of Substituted Anthracenes, Quinolines, and Isoquinolines
作者:Tamotsu Takahashi、Yanzhong Li、Petr Stepnicka、Masanori Kitamura、Yanjun Liu、Kiyohiko Nakajima、Martin Kotora
DOI:10.1021/ja016848k
日期:2002.1.1
Reactions of tetraiodobenzene with zirconacyclopentadienes, which were conveniently prepared from two alkynes (or diynes) and zirconocene complexes, afforded 1,2,3,4-tetrasubstituted diiodonaphthalene derivatives in good isolated yields. These 1,2,3,4-tetrasubstituted diiodonaphthalene derivatives could be converted to 1,2,3,4,5,6,7,8-octasubstituted anthracene derivatives by reaction with a second
四碘苯与氧化锆环戊二烯反应,可方便地由两种炔烃(或二炔烃)和二茂锆配合物制备,以良好的分离产率得到 1,2,3,4-四取代的二碘萘衍生物。这些 1,2,3,4-四取代的二碘代萘衍生物可以通过与第二个锆并环戊二烯反应转化为 1,2,3,4,5,6,7,8-八取代的蒽衍生物。当两种锆并环戊二烯不同时,得到1,2,3,4-四乙基-5,6,7,8-四苯基蒽等不对称蒽(68%的分离产率)。另一方面,用氧化锆环戊二烯处理 2,3-二卤代吡啶(例如 2-溴-3-碘吡啶)以良好至高产率得到 5,6,7,8-四取代的喹啉衍生物。3、