Cyclopentadienyl)[η￣5- (1-(4-methoxyphenyl)cyclohexyl)-cyclopentadienyl]titanium dichloride has been synthesized through a novel modified reaction route. The molecular structure of the title complex was determined b...Cyclopentadienyl)[η￣5- (1-(4-methoxyphenyl)cyclohexyl)-cyclopentadienyl]titanium dichloride has been synthesized through a novel modified reaction route. The molecular structure of the title complex was determined by single-crystal Xray diffraction. Crystallographic data: C_(23)H_(26)Ocl_2Ti· 0. 3C_6H_(14),M_r=462. 44, triclinic, P1, a=11. 704(2) , b= 16. 340(4) , C=6. 824(1), a=90. 51(2) , β= 106. 98(1), γ=69. 82(2)°, V= 1165. 4(4) , Z=2, D_c= 1. 317 g/cm￣3, μ(MoKa) = 6. 2cm￣(-1), F(000) = 486 , and the final R= 0. 059 and R_w= 0. 085 for 2723 observed reflections with I>3σ(I). The cyclopentadienyl ring is symmetrically bonded to Ti(Ti-C distances 2. 361 (5)～2. 386 (5)) but the substituted cyclopentadienyl ring is asymmetrically bonded (Ti C2. 327 (4)～2. 438 (4)). The solvent petroleum-ether is disordered in the crystal.展开更多
The diaryldiselenides reacted with titanocene hydried （Cp2TiH） generted from Cp2TiCl2/i-BuMgBr to give arylselenium complexes of titanocene. They reacted readily with diaryliodoiums salt to give unsymmetical diaryls...The diaryldiselenides reacted with titanocene hydried （Cp2TiH） generted from Cp2TiCl2/i-BuMgBr to give arylselenium complexes of titanocene. They reacted readily with diaryliodoiums salt to give unsymmetical diarylselenides.展开更多
Titanocene alanine complex, Cp2Ti(O2CCH(CH3)NH3+Cl-)(2), has been found to have in vitro antitumor activity against Ehrlich ascites tumor cells. Study of the interaction between Cp2Ti(O2CCH(CH3)NH3+Cl-)(2) and DNA by ...Titanocene alanine complex, Cp2Ti(O2CCH(CH3)NH3+Cl-)(2), has been found to have in vitro antitumor activity against Ehrlich ascites tumor cells. Study of the interaction between Cp2Ti(O2CCH(CH3)NH3+Cl-)(2) and DNA by UV-VIS spectra, fluorescence spectra, agarose gel electrophoresis reveals that Cp2Ti(O2CCH(CH3)NH3+Cl-)(2) forms a stable compound with DNA in molar ratio 1:1 and reduces the migration rate of ccc-DNA band and oc-DNA band. However, unlike cisplatin, the complex does not induce nicking of DNA even after a long incubation at a high ratio of the complex to DNA. The results suggest that titanocene-based antitumor agents have different mechanism of action from cisplatin-like antitumor agents.展开更多
Reduction of diaryldiselenides by the system of Cp2TiCl2/Bu'MgBr/THF gave the nucleophilic arylselenium complex. They reacted with diaryl iodonium salts to afford unsymmetrical diaryl selenides in high yields.
文摘Cyclopentadienyl)[η￣5- (1-(4-methoxyphenyl)cyclohexyl)-cyclopentadienyl]titanium dichloride has been synthesized through a novel modified reaction route. The molecular structure of the title complex was determined by single-crystal Xray diffraction. Crystallographic data: C_(23)H_(26)Ocl_2Ti· 0. 3C_6H_(14),M_r=462. 44, triclinic, P1, a=11. 704(2) , b= 16. 340(4) , C=6. 824(1), a=90. 51(2) , β= 106. 98(1), γ=69. 82(2)°, V= 1165. 4(4) , Z=2, D_c= 1. 317 g/cm￣3, μ(MoKa) = 6. 2cm￣(-1), F(000) = 486 , and the final R= 0. 059 and R_w= 0. 085 for 2723 observed reflections with I>3σ(I). The cyclopentadienyl ring is symmetrically bonded to Ti(Ti-C distances 2. 361 (5)～2. 386 (5)) but the substituted cyclopentadienyl ring is asymmetrically bonded (Ti C2. 327 (4)～2. 438 (4)). The solvent petroleum-ether is disordered in the crystal.
基金Project 29672008 was supported by NationalNatural Science Foundation of China.
文摘The diaryldiselenides reacted with titanocene hydried （Cp2TiH） generted from Cp2TiCl2/i-BuMgBr to give arylselenium complexes of titanocene. They reacted readily with diaryliodoiums salt to give unsymmetical diarylselenides.
文摘Titanocene alanine complex, Cp2Ti(O2CCH(CH3)NH3+Cl-)(2), has been found to have in vitro antitumor activity against Ehrlich ascites tumor cells. Study of the interaction between Cp2Ti(O2CCH(CH3)NH3+Cl-)(2) and DNA by UV-VIS spectra, fluorescence spectra, agarose gel electrophoresis reveals that Cp2Ti(O2CCH(CH3)NH3+Cl-)(2) forms a stable compound with DNA in molar ratio 1:1 and reduces the migration rate of ccc-DNA band and oc-DNA band. However, unlike cisplatin, the complex does not induce nicking of DNA even after a long incubation at a high ratio of the complex to DNA. The results suggest that titanocene-based antitumor agents have different mechanism of action from cisplatin-like antitumor agents.
文摘Reduction of diaryldiselenides by the system of Cp2TiCl2/Bu'MgBr/THF gave the nucleophilic arylselenium complex. They reacted with diaryl iodonium salts to afford unsymmetrical diaryl selenides in high yields.
