一种新的亚齿二亚磷酸酯,{双[2-(二苯氧基次膦氧基)-1-萘基]甲基}苯L 1和四齿亚磷酸酯,1,4-双{二[双[2-(二苯氧基次膦氧氧基)-1-萘基]甲基}苯L 2是涉及2-萘酚的缩合分别与苯甲醛或terephthaladehyde,随后用chlorodiphenoxyphosphine处理的简便两个步骤中制备。相应的单核铑(I)配合物[RhL 1(acac)] 1(acac =乙酰丙酮酸)和双核配合物[Rh 2 L 2(acac)2 ] 2和[Rh 2 L 2 Cl 2(CO)2] 3已被隔离。通过动态1 H和31 P NMR光谱研究了溶液中单核和双核铑配合物中配体的通量行为,表明联芳基甲烷单元的旋转受阻。通过X射线分析获得的配合物2的晶体结构显示出其双核性质和“未折叠”的几何形状。配合物1和2催化环己烯的加氢甲酰化,历时4小时,其平均周转频率分别为428和344 mm –1 h –
High-yielding TfOH-catalyzed condensation of phenols with aromatic aldehydes at high pressure. A model synthesis of the benzylidene biphenol key skeleton of blepharismins
An approach to the benzylidene biphenol key component of blepharismins, photoreceptor pigments isolated from Blepharismajaponicum, is reported. This method relies on an efficient TfOH-catalyzed condensation of phenols with aromatic aldehydes in EtOH as a solvent at 3 kbar pressure.
Synthesis and crystal structure of a dinuclear rhodium complex. Catalytic activity of mono- and di-nuclear rhodium phosphite complexes in hydroformylation
作者:Esther K. van den Beuken、Wim G. J. de Lange、Piet W. N. M. Van Leeuwen、Nora Veldman、Anthony L. Spek、Ben L. Feringa
DOI:10.1039/dt9960003561
日期:——
bidentate phosphite, bis[2-(diphenoxyphosphinoxy)-1-naphthyl]methyl}benzene L1 and a tetradentate phosphite, 1,4-bisbis[2-(diphenoxyphosphinoxy)-1-naphthyl]methyl}benzene L2 were prepared in a facile two-step procedure involving condensation of 2-naphthol with respectively benzaldehyde or terephthaladehyde, followed by treatment with chlorodiphenoxyphosphine. The corresponding monuclear rhodium(I) complex
一种新的亚齿二亚磷酸酯,双[2-(二苯氧基次膦氧基)-1-萘基]甲基}苯L 1和四齿亚磷酸酯,1,4-双二[双[2-(二苯氧基次膦氧氧基)-1-萘基]甲基}苯L 2是涉及2-萘酚的缩合分别与苯甲醛或terephthaladehyde,随后用chlorodiphenoxyphosphine处理的简便两个步骤中制备。相应的单核铑(I)配合物[RhL 1(acac)] 1(acac =乙酰丙酮酸)和双核配合物[Rh 2 L 2(acac)2 ] 2和[Rh 2 L 2 Cl 2(CO)2] 3已被隔离。通过动态1 H和31 P NMR光谱研究了溶液中单核和双核铑配合物中配体的通量行为,表明联芳基甲烷单元的旋转受阻。通过X射线分析获得的配合物2的晶体结构显示出其双核性质和“未折叠”的几何形状。配合物1和2催化环己烯的加氢甲酰化,历时4小时,其平均周转频率分别为428和344 mm –1 h –