Acylamino-Directed Specific Sequential Difunctionalizations of Anilides via Metal-Free Relay Reactions for <i>p</i>-Oxygen and <i>o</i>-Nitrogen Incorporation
作者:Yameng Wan、Zhiguo Zhang、Nana Ma、Jingjing Bi、Guisheng Zhang
DOI:10.1021/acs.joc.8b02636
日期:2019.1.18
Novel acylamino-directed relay disubstitutions realize the sequential difunctionalizations of anilides (1) under mild and metal-free conditions for the first time. This [bis(trifluoroacetoxy)iodo]benzene (PIFA) and BF3 center dot Et2O promoted straightforward reaction produces a series of p-acetoxyl- or p-alkoxyl-o-nitro-N-arylamides (2), which are key scaffolds of various drugs, functional materials, and bioactive molecules. The flexibility with respect to the functional groups in these products affords this novel protocol excellent versatility for synthetic applications.