作者:Janina Bucher、Thomas Wurm、Svenja Taschinski、Eleni Sachs、David Ascough、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/adsc.201600987
日期:2017.1.19
one benzyl‐ or allyl‐substituted alkyne attached to an aromatic backbone were converted in the presence of a gold catalyst. In a dual gold‐catalyzed process, gold vinylidenes are formed that selectively undergo formal CH insertion into the C(sp2)–H bond of the offered unsaturated systems. If H atoms are present in the propargylic position, a subsequent isomerization to the aromatic system takes place
1,5 -二炔系统轴承连接到芳族主链一个末端和一个或苄基烯丙基取代的炔转化在金催化剂的存在下进行。在金的双重催化过程中,形成了亚乙烯基金,该亚乙烯基选择性地将正规的CH插入所提供的不饱和体系的C(sp 2)-H键中。如果在炔丙基位置存在H原子,则随后发生向芳族体系的异构化反应,最终生成9 H-芴和11 H-苯并[ b ]芴衍生物。对于在炔丙基位置的季碳,则未观察到进一步的芳构化,因此10 H-苯并[ b高产率地获得]芴衍生物。