AlCl3-Catalyzed Tandem Acetylation of Hydroarylated [60]Fullerenes
摘要:
The AlCl(3)-catalyzed acetylation of 1,2-hydrophenylated [60]fullerenes, HC(60)-Ar, proceeded via a sequential manner involving the acetylation at the hydrogenated fullerene carbon, the following intramolecular cyclization with the adjacent aryl group, the facile loss of water, and the second acetylation of the generated indenylidene double bond. However, the similar reaction of the hydrobiphenylated analogue brought about the normal acetylation at the terminal aromatic ring prior to the same sequential reactions as did hydrophenylated fullerenes.
A Pd(II) catalyst for the hydroarylation of fullerene with boronic acids is presented. Treatment of C-60 with an arylboronic acid in the presence of a catalytic amount of Pd(2-PyCH=NPh)(OCOC6F5)(2) in H2O/1,2-Cl2C6H4 at room temperature furnishes the hydroarylation product (Ar-C-60-H) in good yield with high selectivity. This complex possesses high catalytic activity paired with bench stability in the solid state.
Rh-Catalyzed Arylation and Alkenylation of C<sub>60</sub> Using Organoboron Compounds
作者:Masakazu Nambo、Ryoji Noyori、Kenichiro Itami
DOI:10.1021/ja073042x
日期:2007.7.1
A new organoboron-based arylation and alkenylation of C-60 catalyzed by a rhodium complex was developed. A treatment of C-60 with an organoboron compound in the presence of a catalytic amount of [Rh(cod)(CH3CN)(2)]BF4 in H2O/1,2-Cl2C6H4 furnished a functionalized fullerene (R-C-60-H) with good to excellent selectivity. Aryl, heteroaryl, and alkenyl groups can be installed by the reactions using the corresponding boronic acids, pinacol esters, and potassium trifluoroborates.
AlCl3-Mediated Mono-, Di-, and Trihydroarylation of [60]Fullerene