[EN] ISOCARBOSTYRIL ALKALOIDS AND FUNCTIONALIZATION THEREOF<br/>[FR] ALCALOÏDES D'ISOCARBOSTYRILE ET LEUR FONCTIONNALISATION
申请人:UNIV ILLINOIS
公开号:WO2020117894A1
公开(公告)日:2020-06-11
Enantioselective total syntheses of the anticancer isocarbostyril alkaloids (+)-7-deoxypancratistatin, (+)-pancratistatin, (+)-lycoricidine, and (+)-narciclasine are described. Our strategy for accessing this unique class of natural products is based on the development of a Ni-catalyzed dearomative trans-1,2-carboamination of benzene. The effectiveness of this dearomatization approach is notable, as only two additional olefin functionalizations are needed to construct the fully decorated aminocyclitol cores of these alkaloids. Installation of the lactam ring has been achieved through several pathways and a direct interconversion between natural products was established via a late-stage C-7 cupration. Using this synthetic blueprint, we were able to produce natural products on a gram scale and provide tailored analogs with improved activity, solubility, and metabolic stability.
对抗癌异喹啉生物碱(+)-7-去氧胰蛋白酶素、(+)-胰蛋白酶素、(+)-莱科里西丁和(+)-纳西克拉辛的对映选择性全合成被描述。我们用于获取这一独特类天然产物的策略基于苯的Ni催化去芳构建trans-1,2-碳胺化反应。这种去芳构建方法的有效性显著,因为只需要另外两个烯烃官能团化合物即可构建这些生物碱的完全修饰的氨基环糖核。通过几种途径实现了内酰胺环的安装,并通过晚期C-7杯化反应建立了天然产物之间的直接互变。利用这一合成蓝图,我们能够以克为单位生产天然产物,并提供具有改进活性、溶解性和代谢稳定性的定制类似物。