Short Protecting Group-free Syntheses of Camptothecin and 10-Hydroxycamptothecin Using Cascade Methodologies
作者:Peng Xu、Dong-Sheng Chen、Jie Xi、Zhu-Jun Yao
DOI:10.1002/asia.201403190
日期:2015.4
total synthesis route of camptothecin and 10‐hydroxycamptothecin has been developed in this work. Cascade oxidation of 3‐(hydroxymethyl)furan‐2(5 H)‐one and in situ intermolecular oxa Diels–Alder reaction with vinyl ether was developed and applied to construct the E‐ring, and TMSCl‐promoted cascade closure of the D‐ring delivered the whole skeleton of the alkaloids in the total synthesis. The new short
这项工作已经开发了喜树碱和10-羟基喜树碱的无收敛保护基团的总合成途径。级联的3-(羟甲基)氧化呋喃-2(5 ħ) -酮和原位分子间氧杂与乙烯基醚Diels-Alder反应的开发和应用到构建E环,和的TMSCl-促进的级联闭合d -环在整个合成过程中传递了生物碱的整个骨架。新的短合成法在步骤经济性,低成本,易于获得的起始原料和试剂以及方便的操作方面是有利的。