Synthesis of Tedanolide and 13-Deoxytedanolide. Assembly of a Common C(1)−C(11) Subtarget
作者:Amos B. Smith、Stephanie A. Lodise
DOI:10.1021/ol9909233
日期:1999.10.1
[formula: see text] In this Letter we describe a synthetic strategy and an efficient assembly of a common C(1)-C(11) subtarget, (-)-3, for (+)-tedanolide (1) and (+)-13-deoxytedanolide (2), architecturally complex marine macrolides displaying potent antitumor activity. Key elements of the synthesis include two iterations of the Evans aldol protocol to construct the C(1)-C(6) moiety and a stereocontrolled
[公式:查看文字]在这封信中,我们描述了(+)-泰达内酯(1)和(+)的共同C(1)-C(11)亚标(-)-3的合成策略和有效组装)-13-脱氧大分子内酯(2),在结构上复杂的海洋大环内酯类化合物,具有强大的抗肿瘤活性。合成的关键元素包括Evans aldol协议的两次迭代以构建C(1)-C(6)部分和立体控制的乙烯基阴离子加成生成C(8,9)三取代的烯烃并入C(7)的立体感。用环氧化物模型烷基化表明(-)-3是能进一步精制大环内酯骨架的二硫杂环丁烷。