Methanofullerene Molecular Scaffolding: Towards C60-substituted poly(triacetylenes) and expanded radialenes, preparation of a C60-C70 hybrid derivative, and a novel macrocyclization reaction
作者:Jean-Franjois Nierengarten、Andreas Herrmann、Rik R. Tykwinski、Markus Riittimann、Francois Diederich、Corinne Boudon、Jean-Paul Gisselbrecht、Maurice Gross
DOI:10.1002/hlca.19970800126
日期:1997.2.10
2-[1-ethynyl(prop-2-ynylidene)]propane-1, 3-diol (33). The first mixed C60-C70 fullerene derivative 49, consisting of two methano[60]fullerenes attached to a methano[70]fullerene, was also prepared and fully characterized (Scheme 13). The Cs-symmetrical hybrid compound was obtained by DCC-mediated esterification of bis[2-(2-hydroxy-ethoxy)ethyl] 1, 2-methano[70]fullerene-71, 71-dicarboxylate (46) with an
甲基[60]-富勒烯侧链作为C 60取代聚三乙炔(PTAs)的前体的(E)-己-3-烯-1,5-二炔和3-甲基亚戊五-1,4-二炔的合成,图1)和膨胀的烯化烯(图2)被描述。二乙基(E)-2、3-二炔基丁-2-烯-1、4-二烷基双(2-溴丙烷-二酸酯)5和6与两个C 60分子的Bingel反应(方案2)得到单体的甲硅烷基-受保护的PTA前体9和10,但是它们不能被有效地甲硅烷基化(方案4)。大环产物11、12和17分别是在9和10的合成过程中以及C 60与去甲硅烷基化的类似物16的反应过程中生成的(流程5),这是由将Bingel两次加成到一个C-领域。严格的分析表明,这种新颖的大环化反应以完全的区域选择性和非对映选择性进行。合适的PTA单体的第二种方法尝试了N,N'-二环己基碳二亚胺(DCC)介导的(E)-2,3-diethynylbut-2-ene-1,4-diol的酯化反应(18,方案