作者:Takeshi Shimizu、Tomoharu Satoh、Katsunori Murakoshi、Mikiko Sodeoka
DOI:10.1021/ol052039k
日期:2005.12.1
[chemical reaction: see text]. The stereocontrolled total synthesis of (-)-spirofungin A (1) and (+)-spirofungin B (2a), polyketide-type antibiotics having various antifungal activities, has been achieved employing the Weinreb amide 8, the alkyne 9, and the vinyl boronate 5 readily available from the common intermediate 10. The first synthesis proceeded with a longest linear sequence of 31 steps, affording
[化学反应:见正文]。使用Weinreb酰胺8,炔烃9和乙烯基化合物可实现具有多种抗真菌活性的聚酮化合物类抗生素(-)-螺菌素A(1)和(+)-螺菌素B(2a)的立体控制全合成。硼酸酯5可以很容易地从通用中间体10中获得。第一次合成以31个步骤的最长线性顺序进行,分别提供(-)-1和(+)-2a的总产率分别为7.9%和5.2%。