Chemoselective Carbophilic Addition of α-Diazoesters through Ligand-Controlled Gold Catalysis
作者:Yumeng Xi、Yijin Su、Zhaoyuan Yu、Boliang Dong、Edward J. McClain、Yu Lan、Xiaodong Shi
DOI:10.1002/anie.201404946
日期:2014.9.8
α‐aryldiazoesters was achieved through ligand‐controlled gold catalysis. Unlike a dirhodiumcatalyst (which promotes CH insertion and cyclopropanation) and a copper catalyst (which catalyzes OH and NH insertions), the gold catalyst with an electron‐deficient phosphite as the ancillary ligand exclusively gave the carbophilic addition product, thus representing a new and efficient approach to form “carbophilic
Gold-Catalyzed Controllable C2-Functionalization of Benzofurans with Aryl Diazoesters
作者:Guangyang Xu、Kai Liu、Jiangtao Sun
DOI:10.1021/acs.orglett.7b03390
日期:2018.1.5
A ligand-controlled gold-catalyzed chemoselective C2-functionalization of benzofuran substrates with aryl diazoesters has been developed. The use of IPrAu(PhCN)BArF provides unprecedented dearomatization products bearing a newly formed carbon–carbon double bond at the C2 position of benzofurans. In contrast, the C2-alkylation products have been isolated as the major products for phosphite gold catalysis