Palladium(0) allylic alkylation in a two-phase system or with a supported aqueous phase catalyst期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Palladium(0) allylic alkylation in a two-phase system or with a supported aqueous phase catalyst

Authors:	Agnè s Choplin,Silvia Dos Santos,Franç oise Quignard,Silvana Sigismondi,Denis Sinou

Affiliation:	^a Institut de Recherches sur la Catalyse, C.N.R.S., 2, avenue A. Einstein 69626 Villeurbanne Cédex France ^b Laboratoire de Synthèse Asymétrique, associé au C.N.R.S., CPE Lyon, Université Claude Bernard Lyon 1, 43, boulevard du 11 novembre 1918 69622 Villeurbanne Cédex France

Abstract:	The reaction of allylic carbonates with various acyclic and cyclic carbonucleophiles is catalyzed by the system Pd(OAc)₂ and P(C₆H₄-m-SO₃Na)₃ (or tppts) in a two-phase liquid medium H₂O-nitrile, the activity of the catalyst depending mainly on the nature of the nitrile, the temperature of the reaction and the ratio palladium/tppts. The same system Pd(OAc)₂ and P(C₆H₄-m-SO₃Na)₃ supported on silica catalyzes also this reaction. The formation of the active palladium species in the two cases is followed by Full-size image NMR spectroscopy and discussed.

Keywords:	Allylic substitution Two-phase catalysis Supported aqueous phase catalysis Palladium tppts
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