作者:Pol Karier、Felix Ungeheuer、Andreas Ahlers、Felix Anderl、Christian Wille、Alois Fürstner
DOI:10.1002/anie.201812096
日期:2019.1.2
does not cohere with the conventional logic of metathesis, according to which macrocycles are best closed at a disubstituted olefinic site; rather, the trisubstituted C11−C12 alkene flanked by an allylic ‐OH group served as the pivot point for synthesis. This motif was attained in good yield and excellent selectivity by a sequence of alkyne metathesis, trans‐hydrostannation and cross coupling. Because
本文所述的抗癌剂根霉菌素D的新方法与常规的复分解逻辑不符,根据复分解的逻辑,大环最好在双取代的烯烃位点处封闭。相反,侧接有烯丙基-OH基团的三取代C11-C12烯烃是合成的关键点。通过炔烃复分解,反式-氢锡烷基化和交叉偶联的序列,可以以高收率和优异的选择性获得该基序。由于完全相同的子结构在众多其他天然产品中也很突出,因此基础策略尽管不寻常,但可能具有更广泛的相关性。