Phenanthrene Synthesis by Iron-Catalyzed [4 + 2] Benzannulation between Alkyne and Biaryl or 2-Alkenylphenyl Grignard Reagent
作者:Arimasa Matsumoto、Laurean Ilies、Eiichi Nakamura
DOI:10.1021/ja201931e
日期:2011.5.4
benzannulation reaction of internal or terminal alkynes with 2-biaryl, 2-heteroarylphenyl, or 2-alkenylphenyl Grignard reagents in the presence of Fe(acac)(3), 4,4'-di-tert-butyl-2,2'-bipyridyl, and 1,2-dichloro-2-methylpropane takes place at room temperature in 1 h to give 9-substituted or 9,10-disubstituted phenanthrenes and congeners in moderate to excellent yields. The reaction tolerates sensitive
在 Fe(acac)(3), 4,4'-二叔丁基存在下,内部或末端炔烃与 2-联芳基、2-杂芳基苯基或 2-烯基苯基格氏试剂的 [4+2] 苯环化反应-2,2'-联吡啶和 1,2-二氯-2-甲基丙烷在室温下发生 1 小时,以中等至极好的收率得到 9-取代或 9,10-二取代的菲和同系物。该反应耐受敏感的官能团,如溴化物和烯烃。当应用于 1,3-二炔时,环化反应发生在两个炔基部分上,得到双菲衍生物。