Concise Total Synthesis of (±)-Deguelin and (±)-Tephrosin Using a Vinyl Iodide as a Key Building Block
作者:Shengtao Xu、Guangyu Wang、Feijie Xu、Wenlong Li、Aijun Lin、Hequan Yao、Jinyi Xu
DOI:10.1021/acs.jnatprod.7b00794
日期:2018.4.27
A concise and protecting-group-free total synthesis of the antiproliferative natural product (±)-deguelin (2) was accomplished in four steps and 62% overall yield from commercially available precursors. The key transformation employed a vinyl iodide as the pivotal building block to construct the 4-acylchromene substructure present in deguelin. Subsequent Cu2O-mediated α-hydroxylation of deguelin (2)
四个步骤即可完成抗增殖天然产物(±)-deguelin(2)的简洁且无保护基团的总合成,并且可从市售前体中获得62%的总收率。关键的转变是使用碘乙烯作为关键的结构单元,以构建存在于deguelin中的4-酰基亚甲基亚结构。随后,Cu 2 O介导的杜格菌素(2)的α-羟基化作用以90%的收率获得了替弗罗辛(3)。