Ring expansion of 11H-benzo[b]fluorene-11-methanols and related compounds leading to 17,18-diphenyldibenzo[a,o]pentaphene and related polycyclic aromatic hydrocarbons with extended conjugation and novel architectures
作者:Yonghong Yang、Weixiang Dai、Yanzhong Zhang、Jeffrey L. Petersen、Kung K. Wang
DOI:10.1016/j.tet.2006.02.066
日期:2006.5
88% yield. Similarly, 17,18-diphenyldibenzo[a,o]pentaphene possessing a helical twist and bearing two phenyl substituents at the most sterically congested C17 and C18 positions and other related compounds were likewise synthesized. Subsequent intramolecular arylation reactions involving the phenyl substituents produced polycyclic aromatichydrocarbons with novel architectures.
7-(1,1-二甲基乙基)-13-苯基-8 H-茚并[2,1 - b ]菲与低聚甲醛缩合产生相应的9-芴基甲醇衍生物,该衍生物经P 2 O 5处理可促进Wagner反应–扩环的Meerwein重排提供了88%收率的14-苯基二苯并[ a,j ]蒽。同样,17,18-二苯基二苯并[ a,o具有最螺旋的C17和C18位置具有螺旋形扭曲并带有两个苯基取代基的]戊苯和其他相关化合物也被合成。随后的涉及苯基取代基的分子内芳基化反应产生具有新颖结构的多环芳烃。