Total Synthesis of Boletopsin 11 Enabled by Directed <i>ortho</i>-C(sp<sup>2</sup>)–H Arylation
作者:Meng Yao Zhang、Russell A. Barrow
DOI:10.1021/acs.joc.8b00792
日期:2018.6.15
A nine-step synthesis of boletopsin 11 (1), a bioactive fungal natural product, is disclosed. Key features include a one-pot [O]-oxa-Michael cascade to establish the polyoxygenated dibenzofuran core followed by a Pd-catalyzed directed ortho-C(sp2)–H arylation to complete the fully functionalized carbon skeleton. Exploration of the latter transformation led to the discovery of an unexpected tandem ortho-C(sp2)–H