titanium tetrachloride in dichloromethane
under N2, at -78°C, stirred for 1h; filtered, washed (hexane), solvent removed, chromd. (silica gel, hexane); NMR, IR, MS;;
参考文献
Herndon, James W.; Harp, Jill J.
Journal of Organometallic Chemistry, 1990 , vol. 393, # 1 p. C1 - C5