Studies toward the syntheses of pluramycin natural products. The first total synthesis of isokidamycin
作者:B. Michael O’Keefe、Douglas M. Mans、David E. Kaelin、Stephen F. Martin
DOI:10.1016/j.tet.2011.05.117
日期:2011.9
highly efficient Diels–Alder reaction between a substituted naphthyne and a glycosylated furan to form the anthracene core bearing a pendent angolosamine C-glycoside. The regiochemical outcome of the Diels–Alder reaction was controlled by employing a disposable silicon tether to link the reactive naphthyne and the glycosyl furan, rendering the cycloaddition intramolecular. The benzopyranone moiety of
我们报告了复杂C-芳基糖苷异基霉素的首次全合成,这是天然存在的多霉素抗生素基达霉素的差向异构体。该合成具有取代萘和糖基化呋喃之间的高效 Diels-Alder 反应,以形成带有悬垂的 angolosamine C-糖苷的蒽核心。Diels-Alder 反应的区域化学结果是通过使用一次性硅系链连接反应性萘和糖基呋喃来控制的,从而使环加成成为分子内的。芳环的苯并吡喃酮部分通过将官能化的乙烯基酰胺环化到高级蒽酚中间体上而附加。万古胺氨基糖苷由O引入→产生β-异头物的C-糖苷重排。随后的再功能化然后导致异奇霉素。