Palladium (0)??Catalyzed Isomerization of (Z)??1, 4??Diacetoxy??2??butene− Dependence of η1??or η3??Allylpalladium as a Key Intermediate on the Solvent Polarity

S Bouquillon, J Muzart

文献索引：Bouquillon, Sandrine; Muzart, Jacques European Journal of Organic Chemistry, 2001 , # 17 p. 3301 - 3305

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被引用次数: 8

摘要

Abstract In the presence of Pd (PPh 3) 4,(Z)-1, 4-diacetoxy-2-butene is selectively isomerized to (E)-1, 4-diacetoxy-2-butene in THF while both (E)-1, 4-diacetoxy-2-butene and 1, 2-diacetoxy-3-butene are obtained in DMF. Evidence to support the involvement of an η 1- allylpalladium in the former solvent and of a cationic η 3-allylpalladium in the latter as the keys intermediates is presented.