A convergent procedure for the preparation of optically active twelve-membered diketodiyne derivatives with C2 symmetry possessing four hydroxy functionalities was developed starting from the commercially available diethyl L-tartrate. The key step for the construction of the twelve-membered diyne framework involved an intramolecular chromous chloride-mediated coupling reaction between the aldehyde functionality and the alkyne moiety having an iodine atom at its terminus.
从市场上可买到的
L-酒石酸二
乙酯开始,开发出了一种具有四个羟基官能团的 C2 对称性十二元二
酮衍
生物的制备方法。构建十二元二炔框架的关键步骤是在醛官能团和末端含有一个
碘原子的炔分子之间进行分子内
氯化
铬介导的偶联反应。