Process for the preparation of chloroarylacetylene precursors

Details Process for the preparation of chloroarylacetylene precursors Process for the preparation of chloroarylacetylene precursors

C - Chemistry, Metallurgy

07

C

260/626, 260/635

C07C 29/00 (2006.01) C07C 17/00 (2006.01) C07C 23/12 (2006.01) C07C 29/32 (2006.01) C07C 29/62 (2006.01) C07C 31/00 (2006.01) C07C 33/00 (2006.01)

Patent

CA 1113965

Abstract Chloroarylacetylenes such as m-chlorophenylacetyl- ene and certain precursors to such chloroarylacetylene are prepared by reacting a chloroarylbromide with a substituted terminal acetylene compound containing at least three carbon atoms and a hydroxy group on the carbon atom adjacent to the acetylene group in the presence of a dialkyl or trialkyl amine solvent and a catalyst system consisting of a palladium complex containing two halogen moieties and two tri-substituted phosphine moieties. Additional tri- phenylphosphine can be added. A cuprous iodide promoter is also employed in the reaction sequence.

336460

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