作者:Wenyuan Qian、Yves Rubin
DOI:10.1021/jo026033+
日期:2002.11.1
An efficient synthesis of the two diastereomeric tetrakisfulleroids 14a and 14b is described starting from the readily accessible trans-1 bis-Diels-Alder adduct 12. The challenging issue of generating multiple bond scissions regiochemically within the fullerene framework, here as [5,6] open systems (fulleroids), is simplified into performing two separate regiocontrol phases. The initial bisadduct 12
从易于获得的反式-1双-Diels-Alder加合物12开始,描述了两种非对映四基体富勒烯化合物14a和14b的有效合成。富勒烯骨架内在区域化学上产生多个键裂的挑战性问题,此处为[5,6]开放系统(fulleroids)简化为执行两个单独的区域控制阶段。初始双加合物12只能进行合成或抗光化学促进的分子内串联[4 + 4]和逆向[2 + 2 + 2]重排,从而使两个异构体14a和14b的比例达到意外的1:4。有趣的是,这两个异构体的紫外可见吸收光谱差异很大,即使它们的局部生色团扰动彼此远离。