Synthesis of<i>trans</i>-1,<i>trans</i>-2,<i>trans</i>-3, and<i>trans</i>-4 Bisadducts of C<sub>60</sub>by Regio- and Stereoselective Tether-Directed Remote Functionalization
作者:Sergey Sergeyev、Michael Schär、Paul Seiler、Olena Lukoyanova、Luis Echegoyen、François Diederich
DOI:10.1002/chem.200401253
日期:2005.4.8
The double Bingel reaction of fullerene C60 with bismalonates attached to a Troger base derived tether afforded trans-1, trans-2, trans-3, and trans-4 bisadducts with excellent regioselectivity. In particular, enantiomerically pure bisadducts with inherently chiral trans-2 or trans-3 addition patterns were prepared starting from enantiomerically pure bismalonates. The absolute configuration of the
富勒烯C60与双丙二酸酯连接到Troger碱衍生的系链的双重Bingel反应提供了具有出色的区域选择性的反式1,反式2,反式3和反式4双加合物。特别地,从对映体纯的双丙二酸酯开始制备具有固有手性反式2或反式3加成模式的对映体纯的双加合物。反式-2和反式-3双加合物的绝对构型由其CD光谱确定。考虑到富勒烯的相对半球中两个反应键之间的距离很长,被双链连接时,双加成反应中的出色的非对映选择性特别显着。现在,通过使用适当的手性,