New Catalyst Precursors Constituted of AsPh3 and Palladium on Carbon or Palladium(II) Acetate as Efficient Promoters of Selective Cross-Coupling Reactions between Functionalized Alkenyl Halides and Aryl- or 1-Alkynylzinc Chlorides
- 1 April 1995
- journal article
- letter
- Published by Georg Thieme Verlag KG in Synlett
- Vol. 1995 (04) , 344-346
- https://doi.org/10.1055/s-1995-4949
Abstract
The catalyst precursor consisting of a mixture of 10 % palladium on carbon and 3.9 equiv of AsPh3 as well as that obtained by treatment of Pd(OAc)2 with 4 equiv of AsPh3 in THF at 60 °C for 1 h have been proven to be suitable for promoting efficient cross-coupling reactions between aryl- or 1-alkynylzinc chlorides and alkenyl halides which contain an electron-withdrawing substituent linked to their carbon-carbon double bond. The activity of these catalyst precursors has been found to be comparable to that of the more expensive and air unstable Pd(PPh3)4.Keywords
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