我们开发了一种合成方法来制备具有三个不同芳基的 ( E )-1,3,6-三芳基富烯。1,4-diaryl-1-bromo-1,3-butadienes 与甲硅烷基乙炔在钯催化剂存在下反应生成 ( E )-3,6-diaryl-1-silyl-fulvenes,收率良好至极佳。将由此获得的(异丙氧基)甲硅烷基化富烯转化为带有不同类型芳基取代基的 ( E )-1,3,6-三芳基富烯。( E )-3,6-Diaryl-1-silyl-fulvenes 是合成多种 ( E )-1,3,6-triarylfulvenes 的有前途的模板。
Regioselective Synthesis of Multisubstituted Benzenes by Palladium-Catalyzed Intermolecular Reaction of β-Iodo-β-silylstyrenes with Alkynes
摘要:
The Pd-catalyzed reaction between beta-iodo-beta-silyistyrenes and terminal alkynes in i-Pr2NEt gave 1,2,3,5-tetrasubstituted benzenes with complete regioselection. The use of certain silylacetylenes as alkynes enabled efficient synthesis of 1,3,5-trissilyl-2-arylbenzenes, which could be transformed into other multisubstituted benzenes by displacement of the silyl groups.