Stoichiometric and Catalytic Cross Dimerization between Conjugated Dienes and Conjugated Carbonyls by a Ruthenium(0) Complex: Straightforward Access to Unsaturated Carbonyl Compounds by an Oxidative Coupling Mechanism
作者:Masafumi Hirano、Yasutomo Arai、Yuka Hamamura、Nobuyuki Komine、Sanshiro Komiya
DOI:10.1021/om300234d
日期:2012.5.28
and catalytic cross dimerizations between conjugated dienes and conjugated carbonyls are studied. The reaction of Ru(η4-cisoid-1,3-butadiene)(η4-1,5-COD)(NCMe) (2a) with methyl acrylate gives a Ru(0) complex, Ru[methyl η4-cisoid-(2E,4E)-hepta-2,4-dienoate](η4-1,5-COD)(NCMe) (3aa) in 97% yield. Similar treatments of 2a with a series of tert-butyl acrylate, methyl crotonate, 3-buten-2-one, and N,N-dimethylacrylamide
研究了共轭二烯和共轭羰基之间的一系列化学计量和催化交叉二聚。(η钌的反应4 - cisoid- 1,3-丁二烯)(η 4 -1,5-二COD)(NCMe)(图2a)与丙烯酸甲酯给出了钌(0)络合物,钌[甲基η 4 - cisoid -(2 ë,4 ë) -庚-2,4-二烯酸乙酯(η 4 -1,5-二COD)(NCMe)(3AA)以97%的产率。用一系列丙烯酸叔丁酯,巴豆酸甲酯,3-丁烯-2-酮和N,N-二甲基丙烯酰胺进行的2a相似处理产生类似的3ac。当(ê)-1,3-戊二烯络合物2d中被用在与丙烯酸甲酯的反应中,支链的偶联产物的Ru [甲基η 4 - cisoid-(2 ë,4 ê)-4- methylhepta -2,4-二烯酸酯](η 4 -1,5-二COD)(NCMe)(3da- b)的显性产率为65%,在19%的产率线性产物一起获得。在(E)-2,5-二甲基六-1,3-二烯配合物