Total Synthesis and Stereochemical Assignment of Sunshinamide and Its Anticancer Activity
作者:Joyanta Mondal、Ruma Sarkar、Prosenjit Sen、Rajib Kumar Goswami
DOI:10.1021/acs.orglett.0c00070
日期:2020.2.7
Total synthesis of cyclodepsipeptide sunshinamide has been achieved for the first time using a convergent approach. The key features of this synthesis comprise Crimmins acetate aldol, Shiina esterification, amide coupling, macrolactamization, and an I2-mediated deprotection with concomitant disulfide-bridge formation. This synthetic study enabled the unambiguous determination of the stereochemistry
使用会聚方法首次实现了环二肽苏糖胺的全合成。该合成的关键特征包括乙酸Crimmins醛醇缩醛,Shiina酯化,酰胺偶联,大内酰胺化以及I2介导的脱保护作用,同时形成二硫键。这项合成研究能够明确确定分离出的Sunshinamide的立体中心的立体化学。评估了日新酰胺及其类似物之一对不同癌细胞和非癌细胞的细胞毒性,这揭示了它们在极低浓度下对癌细胞的吸引力和选择性。