Proposed tennis ball and basket- and -lid routes to C60: two relevant C45 compounds †
作者:Robert J. Ferrier、Steven G. Holden、Olga Gladkikh
DOI:10.1039/b004272m
日期:——
Two formal synthetic routes to C60, both heavily symmetry dependent and based on the use of the C15H18 hydrocarbon “trindane” (1) which is a repeating unit within the spherical structure, are proposed. One relies on Diels–Alder coupling of the two C30 derivatives 5 and 6 of the readily prepared “trindanone” dimer 3 to give the T-shaped molecule 7 which on dehydration and dehydrogenation could afford the spherical target by a “tennis ball” approach. The other is based on the C45 bowl-like trindane trimer 17 which could be capped by a C15 lid to afford 18 prior to dehydrogenation. Progress along these routes is reported and the two relevant but “off-route” C45 compounds 19 and 24 are described, their structures being determined by X-ray crystallographic methods.
本文提出了两条合成C60的正式路线,这两条路线均高度依赖于对称性,并且基于C15H18烃类化合物“trindane”(1)的使用,该化合物是球形结构中的重复单元。其中一条路线依赖于Diels-Alder偶联反应,即将容易制备的“trindanone”二聚体3的两个C30衍生物5和6偶联,得到T形分子7,该分子7在脱水脱氢后可通过“网球”法形成球形目标。另一条路线基于C45碗状trindane三聚体17,该三聚体可在脱氢前用C15盖子封住,得到18。本文报告了这些路线的进展,并描述了两种相关但“偏离路线”的C45化合物19和24,其结构通过X射线晶体学方法确定。