Photochemical [2+2] cycloaddition of C60 with podophyllotoxin derivative containing a cyclohexadienone group in o-dichlorobenzene afforded an isomeric mixture of adducts and a pure adduct of C60-fused podophyllotoxin ...Photochemical [2+2] cycloaddition of C60 with podophyllotoxin derivative containing a cyclohexadienone group in o-dichlorobenzene afforded an isomeric mixture of adducts and a pure adduct of C60-fused podophyllotoxin derivatives. The structures of the products were characterized by MS, NMR and IR spectra.展开更多
A series of novel Meldrum＇s acid C60 derivatives were prepared in moderate yields from a convenient one-pot reaction of C60, the Meldrum＇s acid derivatives, 12 and 1,8-diazabicyclo-[5,4,0]-undec-7-ene （DBU） in tol...A series of novel Meldrum＇s acid C60 derivatives were prepared in moderate yields from a convenient one-pot reaction of C60, the Meldrum＇s acid derivatives, 12 and 1,8-diazabicyclo-[5,4,0]-undec-7-ene （DBU） in toluene at room temperature under nitrogen atmosphere. All the new compounds were fully characterized by the spectral data and elemental analysis. A carbene intermediate mechanism was proposed for this reaction.展开更多
Nitrenes generated by thermolysis of alkyl azides were found to add to C60 in chloroben-zene solvent. The product was isolated by means of silica gel chromatography and identified by field desorption mass spectroscopy...Nitrenes generated by thermolysis of alkyl azides were found to add to C60 in chloroben-zene solvent. The product was isolated by means of silica gel chromatography and identified by field desorption mass spectroscopy and 13C NMR spectroscopy.展开更多
Since the achievement of the preparative-scale isolation of buckminsterfullerene,efforts to prepare derivatives of C<sub>60</sub> have led to the synthesis and X-ray characterization of osmylated and plati...Since the achievement of the preparative-scale isolation of buckminsterfullerene,efforts to prepare derivatives of C<sub>60</sub> have led to the synthesis and X-ray characterization of osmylated and platinum complexes.And subsequently, synthesis and X-ray characterization of several other derivatives, such as buckminsterfullerene undergoing Diels-Alder reactions with anthracene, furan, and cyclopentadiene,have also been reported.Smith described the generation and structure elucidation of 1,2-methanobuckminsterfullerene,the parent fullerene cyclopropane,and treated C<sub>60</sub> in展开更多
文摘Photochemical [2+2] cycloaddition of C60 with podophyllotoxin derivative containing a cyclohexadienone group in o-dichlorobenzene afforded an isomeric mixture of adducts and a pure adduct of C60-fused podophyllotoxin derivatives. The structures of the products were characterized by MS, NMR and IR spectra.
基金Project supported by the National Natural Science Foundation of China （No. 20532040）.
文摘A series of novel Meldrum＇s acid C60 derivatives were prepared in moderate yields from a convenient one-pot reaction of C60, the Meldrum＇s acid derivatives, 12 and 1,8-diazabicyclo-[5,4,0]-undec-7-ene （DBU） in toluene at room temperature under nitrogen atmosphere. All the new compounds were fully characterized by the spectral data and elemental analysis. A carbene intermediate mechanism was proposed for this reaction.
文摘Nitrenes generated by thermolysis of alkyl azides were found to add to C60 in chloroben-zene solvent. The product was isolated by means of silica gel chromatography and identified by field desorption mass spectroscopy and 13C NMR spectroscopy.
文摘Since the achievement of the preparative-scale isolation of buckminsterfullerene,efforts to prepare derivatives of C<sub>60</sub> have led to the synthesis and X-ray characterization of osmylated and platinum complexes.And subsequently, synthesis and X-ray characterization of several other derivatives, such as buckminsterfullerene undergoing Diels-Alder reactions with anthracene, furan, and cyclopentadiene,have also been reported.Smith described the generation and structure elucidation of 1,2-methanobuckminsterfullerene,the parent fullerene cyclopropane,and treated C<sub>60</sub> in
