Convenient Route to Fischer-Type Carbene Ruthenium Complexes: Highly Selective Catalysts for Ring Opening/Cross-Metathesis of Norbornene Derivatives
作者:Hiroyuki Katayama、Masato Nagao、Fumiyuki Ozawa
DOI:10.1021/om020772z
日期:2003.2.1
The Fischer-type ruthenium carbene complexes RuCl2=C(H)ER}(PCy3)(2) (ER = SPh (1a), SC6H4Me-p (1b), SC6H4Cl-p (1c), SC6H4OMe-p (1d), SePh (1e)) have been prepared by the reactions of Ru(p-cymene)(cod), PCy3, and the corresponding dichloromethyl chalcogenides (Cl2CHER) in 47-80% yields. The starting Ru(p-cymene)(cod) is readily synthesized in high yield from [RuCl2(p-cymene)](2). The X-ray structures of 1b and 1e are reported. Complexes la and le serve as highly selective catalysts for ring opening/cross-metathesis of norbornene derivatives with vinyl chalcogenides.