of C60 were prepared by templated synthesis strategies. Compound 8 with a dipyridylmethano addend in a pseudo-octahedral additionpattern was obtained by DMA-templated addition (DMA=9,10-dimethylanthracene; Scheme 1) and served as the starting material for the first supramolecular fullerene dimer 2. Hexakis-adduct 12 also possesses a pseudo-octahedral additionpattern and was obtained by a sequence of
Multiple Adducts of C60 by Tether-Directed Remote Functionalization and synthesis of soluble derivatives of new carbon allotropes Cn(60+5)
作者:Lyle Isaacs、Fran�ois Diederich、Richard F. Haldimann
DOI:10.1002/hlca.19970800202
日期:1997.3.24
comprehensive series of multiple adducts of C60 was prepared by tether-directedremotefunctionalization. When the tether-reactive-group conjugates 2 and 10 were attached to methano[60]fullerenecarboxylic acid ( = cyclopropafullerene-C60-Ih-carboxylic acid) and C60, respectively, the e-bis-adducts 4 and 9 (Schemes 1 and 2) were obtained with complete regioselectivity as predicted by semi-empirical PM3 calculations
A Methodology for the Reversible Solubilization of Fullerenes
作者:Yi-Zhong An、George A. Ellis、Argimiro L. Viado、Yves Rubin
DOI:10.1021/jo00125a022
日期:1995.10
The poor solubility of certain fullerene derivatives, especially those bearing several fullerene moieties, has hampered the preparation of new materials. We are proposing a strategy which uses fullerenes bearing a readily removable solubilizing group to carry out reaction steps leading to a final product with intrinsic low solubility. This is now possible with the one-step conversion of the t-BOC derivative 8a to C-60 in over 95% yield. This one-pot conversion involves the in situ formation of diene 4 which, after [4 + 2] cycloaddition with dimethyl acetylenedicarboxylate, affords the bicyclic adduct 11 undergoing rapid cycloreversion to C-60 and dimethyl phthalate. This method was tested with two functionalized C-60 derivatives (14 and 18) as a first step toward the preparation of new nanosized molecular allotropes of carbon and rigid fullerene-rich polymers.