Novel diazadienes based on 1,3,4-oxadiazines: Ligands in iron carbonyl complexes and substrates in catalytic [2+2+1] cycloaddition reactions

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• 作者：Katharina Kaleta ; Jan Fleischhauer ; Helmar Gö ; rls ; Rainer Beckert ; Wolfgang Imhof
• 关键词：Iron ; Ruthenium ; Carbonyl complexes ; Catalysis ; Cycloaddition ; Lactams
• 刊名：Journal of Organometallic Chemistry
• 出版年：2009
• 出版时间：1 November 2009
• 年：2009
• 卷：694
• 期：23
• 页码：3800-3805
• 全文大小：495 K

文摘

N,N′-(4-methyl-4H-1,3,4-oxadiazine-5,6-diylidene)-bis-aniline derivatives react with Fe₂(CO)₉ to give dinuclear iron carbonyl complexes. One of the iron atoms is bonded symmetrically to both exocyclic imine nitrogen atoms. The second iron atom shows a side-on coordination towards the CN bond next to the oxadiazine oxygen atom. In addition, the iron atoms are connected via a metal metal bond. The same oxadiazine derivatives produce chiral spiro-lactams in a ruthenium catalyzed formal [2+2+1] cycloaddition reaction with carbon monoxide and ethylene.