作者:Karsten Krohn、Peter Frese、Ulrich Flörke
DOI:10.1002/1521-3765(20001103)6:21<3887::aid-chem3887>3.0.co;2-3
日期:2000.11.3
The first synthesis of the racemic 8-deoxy WP3688-2 angucycline antibiotic (3), with characteristic cis-hydroxy groups at C-4 a and C-12b, is reported. Key steps involve the coupling, mediated by samarium diiodide, of the bicyclic trione 37 to the tricyclic cis-diol 39. Biomimetic aldol cyclization of the corresponding dione 41 gave a mixture of the tetracyclic cis- and trans-3,4a-diols 42 and 43,
据报道首次合成了外消旋的8-脱氧WP3688-2安古环素抗生素(3),在C-4a和C-12b处具有特征性的顺式羟基。关键步骤包括由二碘化sa介导的双环三酮37与三环顺式二醇39的偶合。相应二酮41的仿生羟醛环化反应得到四环顺式和反式3,4a-二醇的混合物42 43、43被硝酸铈铵氧化为醌45和3。合成化合物45和3的构型分别对应于安古环素抗生素Aquayamicin(1)和WP 3688-2(2)。