Silylfullerenes.

Abstract

: Novel chemical derivatizations of C60, higher fullerenes and endohedral metallofullerenes with activated organosilicon compounds have been made to afford the mono-and bis-silylated fullerenes (silylfullerenes) in order to understand the basic chemical properties of fullerenes and to obtain new derivatives with interesting physical and chemical properties.

Synthesis and Characterization of Exohedrally Silylated M@C82 (M = Y and La)

“…In contrast, the absorption spectra of La@C 82 adducts such as La@C 82 (Ad) 9 and La@C 82 (CH 2 ) 2 NCH 3 , which have carbon substituents, are similar to that of the pristine La@C 82 . These results reveal that silylation is effective for tuning the electronic character of mono-metallfullerenes as well as empty fullerenes 2 Absorption spectra of La@C 82 -A and its derivatives in CS 2 solution. …”

“…Although empty fullerenes such as C 60 and C 70 react only photochemically with disilirane, metallofullerenes such as M@C 82 (M = La, Pr, Ce, and Gd) can be exohedrally functionalized with disilirane in both thermal and photochemical ways due to their low reduction potentials. − We adopted thermal reaction to obtain the silylated La@C 82 -A in a large scale. A toluene solution of La@C 82 -A and 1,1,2,2-tetramesityl-1,2-disilirane ( 1 ) was heated at 80 °C for 13 h to afford a mixture of the monoadduct isomers.…”

Ketone derivatives of diels‐alder adducts of levopimaric acid with acrylic acid and maleic anhydride: Synthesis, characterization, and polymerization

“…Before their use in polymer synthesis, resin acids were transformed, either into unsaturated monomers (acrylic, vinylic) or into bi‐ or polyfunctional compounds. For this purpose some routes, such as those shown below, were used: chemical transformation, via cycloaddition reactions, into diacids, dialdehydes, polybasic acids,1–6 or unsaturated compounds;7 chemical modification by dimerization, disproportionation, or polymerization;3, 8, 9 the obtainment of epoxy derivatives;10–13 the obtainment of vinyl ester of abietic acid by transesterification in the presence of vinyl acetate14, 15 and of allyl ester by esterification of sodium abietate with allyl halides;16 the obtainment of abietic anhydride 17, 18 …”

Reversible Binding of C60 to an Anthracene Bearing a Dendritic Poly(amidoamine) Substituent to give a Water-Soluble Fullerodendrimer

“…[1] In this type of transformation, the relative stereochemistry of the products reflects that of the parent epoxides, which are usually prepared in the cis or trans forms from the corresponding Z or E olefins, respectively. [3] Recently, Saigo and co-workers and our group have independently reported that the reaction of a 1-(phenylthio)-2,3-epoxyalkane with an organoaluminum reagent resulted in regio-and stereoselective substitution at C2, with double inversion of configuration (Scheme 1). [3] Recently, Saigo and co-workers and our group have independently reported that the reaction of a 1-(phenylthio)-2,3-epoxyalkane with an organoaluminum reagent resulted in regio-and stereoselective substitution at C2, with double inversion of configuration (Scheme 1).…”