Zinc–gold cooperative catalysis for the direct alkynylation of benzofurans
作者:Yifan Li、Jérôme Waser
DOI:10.3762/bjoc.9.204
日期:——
The directalkynylation of benzofurans was achieved for the first time using the hypervalent iodine reagent 1-[(triisopropylsilyl)ethynyl]-1,2-benziodoxol-3(1H)-one (TIPS-EBX) based on the cooperative effect between a gold catalyst and a zinc Lewis acid. High selectivity was observed for C2-alkynylation of benzofurans substituted with alkyl, aryl, halogen and ether groups. The reaction was also successful