作者:Danqi Zou、Yikang Wu、Bubing Zeng
DOI:10.1016/j.tet.2018.04.046
日期:2018.5
Litseadioxanins A and B, the so far only known natural products with a dihydrodioxine ring at the terminal of a side chain, were synthesized for the first time. The peroxy functionality was installed via a photo [4 + 2] cycloaddition of O2 to a multifunctional terminal 1,3-diene, a subtype of the reaction that has only a limited number of simple precedents (mostly monofunctional/with a much shorter
迄今为止,仅合成了迄今仅已知的在侧链末端具有二氢二氧杂环丁烷环的天然产物Litseadioxanins A和B。过氧官能团是通过O 2的光[4 + 2]环加成到多功能末端1,3-二烯的反应而安装的,该反应的子类型仅具有有限的简单先例(主要是单官能的/具有短得多的烷基)链)中的文献。人们发现LED优于传统的汞或钨灯,不仅产量更高,而且大大简化了操作。还首次合成了litseadioxanins的二烯前体(也是天然产物)。借助合成样品,以前未知的[α] D浓度/时间依赖性 这些二烯被揭示出来。