Total Synthesis of (+)- and (−)-Duryne: A Potent Anticancer Agent from the Marine Sponge Cribrochalina Dura. Establishment of the Central Double Bond Geometry and the Absolute Configuration of the Chiral Centers
作者:Benjamin W. Gung、Ann O. Omollo
DOI:10.1021/jo702399j
日期:2008.2.1
Duryne is a C30 polyacetylenic alcohol with C2 symmetry. Despite its potent cytotoxicity, its central double bond geometry and the absolute configuration of the chiral centers were not determined. We report the total syntheses of both enantiomers of the anticancer natural product (+)-duryne and the establishment of its stereochemistry by synthesizing both geometric isomers. The natural (+)-duryne is
Duryne是具有C 2对称性的C30聚炔醇。尽管其具有强的细胞毒性,但尚未确定其中心双键几何形状和手性中心的绝对构型。我们报告了抗癌天然产物(+)-duryne的两个对映异构体的总合成及其通过合成两个几何异构体的立体化学的建立。如结构1中所示,天然(+)-杜伦烯被标识为(15 Z)和(3 S,28 S)。使用自氧化/ Wittig偶联反应合成中心(Z)-烯烃。通过使用LiAlH 4立体选择性地构建(E)-烯烃异构体的立体化学还原相应的炔烃。手性中心的绝对构型是通过伯吉斯假单胞菌AK脂肪酶的酶促拆分方法确定的。