Asymmetric Total Synthesis and Stereochemical Elucidation of the Antitumor Agent PM-94128
作者:Samir K. Patel、Karine Murat、Sandrine Py、Yannick Vallée
DOI:10.1021/ol035470n
日期:2003.10.1
has been synthesized for the first time through a highly stereocontrolled route. The key steps for the synthesis of the dihydroxyamino acid moiety involve a diastereoselective addition of tert-butyl lithiopropiolate to a chiral nitrone and a 2,3-dihydro[1,2]oxazin-6-one dihydroxylation. The synthesis serves to define the relative as well as the absolute configuration of the natural product (bearing five
[反应:请参见文字]。PM-94128是一种新型的十肽抗肿瘤药,它是通过高度立体控制的途径首次合成的。合成二羟基氨基酸部分的关键步骤包括将硫代丙酸叔丁酯非对映选择性地加到手性硝酮上,以及2,3-二氢[1,2]恶嗪-6-一二羟基化反应。该合成用于定义天然产物的相对和绝对构型(带有五个立体异构中心)。