作者:Alberto G. Kravina、Erick M. Carreira
DOI:10.1002/anie.201807709
日期:2018.10
complex secondary metabolite epicolactone is a member of the natural product pool found in cash crop endophytes of the genus Epicoccum. By exploiting inherent reactivity, a total synthesis of this highly oxygenated and polycyclic molecule met chemo‐ and regioselectivity challenges. The key buildup of complexity was accomplished via an intramolecular [2+2] photocycloaddition between a quinone and an
生物活性和结构复杂的次生代谢产物epicolactone是属经济作物内生菌中发现的天然产物库的成员附球菌。通过利用固有的反应性,这种高度氧化的多环分子的全合成遇到了化学和区域选择性挑战。复杂性的关键是通过在醌和缺电子的二烯之间进行分子内[2 + 2]光环加成反应,然后进行环丁烷环扩环来完成的。使用二恶烯作为酰基阴离子当量和分子内羰基甲烯基化可提供天然产物。