| Abstract
| - 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 thereactions 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 highyield from [RuCl2(p-cymene)]2. The X-ray structures of 1b and 1e are reported. Complexes1a and 1e serve as highly selective catalysts for ring opening/cross-metathesis of norbornenederivatives with vinyl chalcogenides.
- Treatment of Ru(p-cymene)(cod) with PCy3 and dichloromethyl phenyl sulfide or selenide affords the Fischer-type carbene ruthenium complexes RuCl2{C(H)ER}(PCy3)2 (ER = SPh, SC6H4Me-p, SC6H4Cl-p, SC6H4OMe-p, SePh) in 47−80% yields.
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