Palladium-Catalyzed Annulation of 2,2′-Diiodobiphenyls with Alkynes: Synthesis and Applications of Phenanthrenes
作者:Yu-De Lin、Chun-Lung Cho、Chih-Wei Ko、Anna Pulte、Yao-Ting Wu
DOI:10.1021/jo302013x
日期:2012.11.16
A range of phenanthrene derivatives were efficiently synthesized by the palladium-catalyzed annulation of 2,2′-diiodobiphenyls with alkynes. The scope, limitations and regioselectivity of the reaction were investigated. The described method was adopted to synthesize 9,10-dialkylphenanthrenes, sterically overcrowded 4,5-disubstituted phenanthrenes and phenanthrene-based alkaloids. Reactions of highly
钯催化的炔烃与2,2'-二碘联苯的环合反应可有效合成一系列菲衍生物。研究了反应的范围,局限性和区域选择性。所描述的方法被用于合成9,10-二烷基菲,空间上拥挤的4,5-二取代菲和菲基生物碱。高甲氧基取代的联苯与2-(2-丙炔基)吡咯烷和2-(2-丙炔基)哌啶的反应分别得到2-(9-菲基甲基)吡咯烷和2-(9-菲基甲基)吡咯烷。产物通过Pictet-Spengler反应转化为菲咯啉和菲喹啉生物碱。