A Unified Strategy for the Total Synthesis of the Angucycline Antibiotics SF 2315A, Urdamycinone B, and the Shunt Metabolite 104-2
作者:Kyungjin Kim、Vincent A. Boyd、Aditya Sobti、Gary A. Sulikowski
DOI:10.1002/ijch.199700004
日期:——
Total syntheses of the angucycline antibiotics SF 2315A (2), urdamycinone B (4), and the shunt metabolite 104–2 (5) are described, as well as an approach toward the synthesis of SF 2315B (3). All four syntheses feature a Diels–Alder cycloaddition between a bromojuglone derivative and an optically active diene (25a), the latter derived from (–)-quinic acid. Subsequent key transformations include (i)
描述了环磷酰胺抗生素SF 2315A(2),urdamycinone B(4)和分流代谢物104-2(5)的总合成,以及合成SF 2315B的方法(3)。所有这四个合成的特征是在溴juglone衍生物和旋光性二烯(25a)之间存在Diels-Alder环加成反应,后者是由(-)-奎宁酸衍生的。随后的关键转变包括(i)立体控制引入SF 2315A(2)和SF 2315 B(3)中具有的环聚氧官能团,(ii)制备C-糖基朱古龙53,以及(iii)NMO介导的60氧化芳构化。