Ligandgesteuerte Ringkontraktion von Nickela-fünf-in Vierringkomplexe—neuartige startsysteme für die präparative chemie

…, A Ballesteros, A Sigan, C Jégat, D Bärhausen…

文献索引：Hoberg, Heinz; Ballesteros, Alfredo; Sigan, Andrei; Jegat, Corine; Baerhausen, Dieter; Milchereit, Armin Journal of Organometallic Chemistry, 1991 , vol. 407, # 3 p. C23 - C29

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被引用次数: 35

摘要

Abstract Nickela-compounds with a five-membered ring, 4, are formed on Ni 0 from CO 2 and alkenes in the presence of the heterodifunctional ligand (cyclo-C 6 H 11) 2 PCH 2 CH 2- 2-pyridyl (2). A ring contraction occurs on addition of a promoteor, such as BeCl 2, or on heating. The greater reactivity of the nickela-complex with a four-membered ring, 6, can be used in the former reactions with CO 2, CO or CH 2 CH 2. Such a sequence of reactions ...