Total Synthesis of (−)-Dactylolide and Formal Synthesis of (−)-Zampanolide via Target Oriented β-<i>C</i>-Glycoside Formation
作者:Fei Ding、Michael P. Jennings
DOI:10.1021/jo8009853
日期:2008.8.1
The total synthesis of (−)-dactylolide and formal synthesis of (−)-zampanolide via target oriented β-C-glycoside formation is described. The two key reactions involved a stereoselective reduction of the appropriate oxocarbenium cation and a highly chemo- and diastereoselective ring-closing metathesis protocol for the formation of the macrocyclic core. In addition to the described chemistry, in vitro
描述了通过靶标定向的β- C-糖苷形成的(-)-三羟甲基萘酚的全合成和(-)-zampanolide的形式合成。这两个关键反应涉及适当的氧碳鎓阳离子的立体选择性还原以及形成大环核心的高度化学和非对映选择性的闭环复分解方案。除上述化学方法外,针对NCI的60个癌细胞系进行了体外天然内酯的对映体筛选,有助于阐明N的至关重要性。扎曼醇化物的β-酰基半胱氨酸侧链,因其报道的强纳摩尔细胞毒性而被报道。此外,借助于(-)-聚乳酸的体外筛选,对于多种癌症,现在已经出现了有希望的癌症治疗先导。更具体地,( - ) - dactylolide显示GI 50个在纳摩尔值(25-99毫微克/毫升)针对四种细胞系HL-60范围,K-562,HCC-2998和SF-539,同时显示适度的LC 50个值。