Asymmetric Total Synthesis and Formal Total Synthesis of the Antitumor Sesquiterpenoid (+)-Eremantholide A
作者:Yi Li、Karl J. Hale
DOI:10.1021/ol0700862
日期:2007.3.1
[structure: see text]. A new asymmetric total synthesis of (+)-eremantholide A is reported in which a Hoveyda-Grubbs ring-closing metathesis (RCM) reaction is used to assemble the nine-membered oxonin ring, and an enolate alkylation between the 3(2H)-furanone 2 and O-triflate 3 is exploited for C(9)-C(10) bond construction. An Evans asymmetric aldol reaction and a Sharpless asymmetric epoxidation served
[结构:见文字]。报道了一种新的不对称全合成(+)-香叶内酯A,其中使用了Hoveyda-Grubbs闭环复分解(RCM)反应组装了九元氧代宁环,并使3(2H)-之间的烯醇化烷基化。呋喃酮2和O-三氟甲磺酸3用于C(9)-C(10)键结构。埃文斯(Evans)不对称羟醛反应和Sharpless不对称环氧化用于立体选择性地安装目标结构的C(6),C(7)和C(8)立体中心。