Acid controlled alkyne dimerisation initiated by a Ru–carbene precursor

K Melis, D De Vos, P Jacobs, F Verpoort

文献索引：Melis, Karen; De Vos, Dirk; Jacobs, Pierre; Verpoort, Francis Journal of Organometallic Chemistry, 2002 , vol. 659, # 1-2 p. 159 - 164

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被引用次数: 32

摘要

The Grubb's catalyst Cl2 (PR3) 2Ru CHPh (1) is an excellent precursor for the dimerisation of terminal alkynes. Thermal treatment and addition of two equivalents of phenylacetylene to complex 1 generates a new Ru–vinylidene (3). Complex 3 catalyses a selective product formation for trans-tail-to-tail enynes. Addition of acetic acid enhances the yield and the reaction rate dramatically and a reversed stereoselectivity for the formation of Z-isomers is ...