α-diketones and β-diketones react with Grignard reagents in the presence of a catalytic amount of Cp2TiCl2 to yield a-ketols and corresponding ketones respectively. Sulfoxides can be deoxygenated by Cp2TiCl2/Al syst...α-diketones and β-diketones react with Grignard reagents in the presence of a catalytic amount of Cp2TiCl2 to yield a-ketols and corresponding ketones respectively. Sulfoxides can be deoxygenated by Cp2TiCl2/Al system. The possible mechanisms are also discussed.展开更多
Reaction of Cp2TiCl2-Mg synthetic equivalent of practical Ti(II) reagent with propargyl alcohol derivatives affords allenyl titanium compounds in good yields.thus, providing an efficient and practical methods for synt...Reaction of Cp2TiCl2-Mg synthetic equivalent of practical Ti(II) reagent with propargyl alcohol derivatives affords allenyl titanium compounds in good yields.thus, providing an efficient and practical methods for synthesis of both allenyl and homopropargyl alcohols by the successive treatment with aldehydes and ketones.展开更多
Initiated by CP_2TiCl_2/Fe redox system,2-halotetrafluoroethyl iodides readily reacted with alkynes or alkenes to give 1:1 adducts in good to excellent yields.
The oligomerization of isoprene catalyzed by Cp2TiCl2 and cocatalyst (cocatalyst = iPrMgCl, NaH, MAO(methylaluminoxane), DIBAL(diisobutylaluminum hydride))has been studied. The two dimers, 2,6dimethyl1, ...The oligomerization of isoprene catalyzed by Cp2TiCl2 and cocatalyst (cocatalyst = iPrMgCl, NaH, MAO(methylaluminoxane), DIBAL(diisobutylaluminum hydride))has been studied. The two dimers, 2,6dimethyl1, trans3,6octatriene and 3,6dimethyl1,3,6octatriene were obtained by distilling under reduced pressure and characterised by GCMS? 1HNMR? 13CNMR and GCIR. The higher oligomer which was extracted by petroleum ether was analyzed by MS and 1HNMR. The mass spectrum shows that the molar weight of the higher oligomer is within 1224, accordingly, the degree of polymerization is ranged from 3 to 18.展开更多
基金Project (No. 20072033) supported by the National Natural Science Foundation of China and the Specialized Research Fund for the Doctoral Program of Higher Education Ministry, China
文摘α-diketones and β-diketones react with Grignard reagents in the presence of a catalytic amount of Cp2TiCl2 to yield a-ketols and corresponding ketones respectively. Sulfoxides can be deoxygenated by Cp2TiCl2/Al system. The possible mechanisms are also discussed.
文摘Reaction of Cp2TiCl2-Mg synthetic equivalent of practical Ti(II) reagent with propargyl alcohol derivatives affords allenyl titanium compounds in good yields.thus, providing an efficient and practical methods for synthesis of both allenyl and homopropargyl alcohols by the successive treatment with aldehydes and ketones.
文摘Initiated by CP_2TiCl_2/Fe redox system,2-halotetrafluoroethyl iodides readily reacted with alkynes or alkenes to give 1:1 adducts in good to excellent yields.
文摘The oligomerization of isoprene catalyzed by Cp2TiCl2 and cocatalyst (cocatalyst = iPrMgCl, NaH, MAO(methylaluminoxane), DIBAL(diisobutylaluminum hydride))has been studied. The two dimers, 2,6dimethyl1, trans3,6octatriene and 3,6dimethyl1,3,6octatriene were obtained by distilling under reduced pressure and characterised by GCMS? 1HNMR? 13CNMR and GCIR. The higher oligomer which was extracted by petroleum ether was analyzed by MS and 1HNMR. The mass spectrum shows that the molar weight of the higher oligomer is within 1224, accordingly, the degree of polymerization is ranged from 3 to 18.
