Total Synthesis of 7-Ethyl-10-hydroxycamptothecin (SN38) and its Application to the Development of C18-Functionalized Camptothecin Derivatives
作者:Yuan-Shan Yao、Jia-Li Liu、Jie Xi、Bukeyan Miu、Guai-Sai Liu、Shaozhong Wang、Linghua Meng、Zhu-Jun Yao
DOI:10.1002/chem.201101389
日期:2011.9.5
N‐acyliminium intermediate with a silyl enolether. An intramolecular oxa Diels–Alder reaction efficiently constructed the D and E rings in one step. Successive asymmetric dihydroxylation and I2‐based hemiacetal oxidation furnished the stereochemistry of SN38 with high enantiopurity. Utilizing the ABC‐ring intermediate and a functionalized silyl enolether permitted the synthesis of a number of new C18‐functionalized