Palladium-Catalyzed Regioselective Coupling of Propargylic Substrates with Terminal Alkynes. Application to the Synthesis of 1,2-Dien-4-ynes
摘要:
The palladium-catalyzed reaction of propargyl halides, tosylates and acetates with terminal alkynes is reported. The best yields are obtained from propargyl chlorides and 1-alkynes (i) in the presence of 2 equiv. of amine (triethylamine, diisopropylamine) in benzene, toluene or ethylacetate (ii) or in pure diisopropylamine. Propargyl acetates undergo the cross coupling reaction with moderate to high yields after modification of the general procedure. (C) 2000 Elsevier Science Ltd. All rights reserved.
An efficient palladium-catalysed reaction of propargyl halides tosylates and acetates with terminal alkynes
作者:Sylvie Gueugnot、Gérard Linstrumelle
DOI:10.1016/s0040-4039(00)79245-8
日期:1993.6
In the presence of palladium complexes and copper iodide, the reaction of propargyl halides with terminal alkynes proceeds rapidly to give conjugated allenynes in high yield. Propargyl acetates and tosylates are also suited to the preparation of such allenes.
Palladium-Catalyzed Regioselective Coupling of Propargylic Substrates with Terminal Alkynes. Application to the Synthesis of 1,2-Dien-4-ynes
作者:Sylvie Condon-Gueugnot、Gérard Linstrumelle
DOI:10.1016/s0040-4020(00)00115-0
日期:2000.3
The palladium-catalyzed reaction of propargyl halides, tosylates and acetates with terminal alkynes is reported. The best yields are obtained from propargyl chlorides and 1-alkynes (i) in the presence of 2 equiv. of amine (triethylamine, diisopropylamine) in benzene, toluene or ethylacetate (ii) or in pure diisopropylamine. Propargyl acetates undergo the cross coupling reaction with moderate to high yields after modification of the general procedure. (C) 2000 Elsevier Science Ltd. All rights reserved.