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首页> 外文期刊>Organometallics >Chiral Arene Ruthenium Complexes. 6.Diastereoselective Formation of Chiral-At-Metal P-Tethered Arene Ruthenium(II) Complexes
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Chiral Arene Ruthenium Complexes. 6.Diastereoselective Formation of Chiral-At-Metal P-Tethered Arene Ruthenium(II) Complexes

机译:手性芳烃钌配合物。 6,金属手性对羟基芳烃钌(II)配合物的非对映选择性形成

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The easily accessible (R)-3-phenylbutanol (1) can be transformed into the novel enantiopure ligand diphenyl((R)-3-phenylbutyl)phosphane (3). 3 splits the complex dimer [{RuCl_2(eta~6-C_6H_5CO_2Me)}_2] (6) by adding as a sigma-ligand to form mononuclear [RuCl_2(eta~6-C_6H_5COOMe)-((R)-eta~1-PPh_2(CH_2)_2CH(CH_3)Ph)] (7). An intramolecular arene ligand displacement reaction leads to [RuCl_2((R)-eta~1-PPh_2(CH_2)_2CH(CH_3)-eta~6-C_6H_5)] (8) with a tethered side chain of the arene ligand. Nucleophilic substitution of a chloride ligand by primary or secondary amines with the assistance of NaBF_4 gives access to the diastereomeric complex salts [RuCl(amine)-((R)-eta~1-PPh_2(CH_2)_2CH(CH_3)-eta~6-C_6H_5)]BF_4. Good diastereoselectivities were obtained for aniline, piperidine, benzylamine, and butylamine complex salts 9-12 (de = 82-90%). The absolute structures of 8-10 have been determined by X-ray structure analysis. S_(RU),RC configurations were found for the major diastereomers of aniline and piperidine complex salts 9 and 10. Not only the side chain stereogenic center but also the metal configuration of the cation of salt 9 is stable for longer periods at low and at elevated temperatures in different solutions.
机译:易于获得的(R)-3-苯基丁醇(1)可以转化为新型对映纯配体二苯基((R)-3-苯基丁基)膦(3)。 3通过添加作为sigma-配体形成单核[RuCl_2(eta〜6-C_6H_5COOMe)-((R)-eta〜1- PPh_2(CH_2)_2CH(CH_3)Ph)](7)。分子内芳烃配体置换反应导致[RuCl_2((R)-eta〜1-PPh_2(CH_2)_2CH(CH_3)-eta-6-C_6H_5)](8)具有芳烃配体的束缚侧链。在NaBF_4的帮助下,伯胺或仲胺对氯化物配体进行亲核取代,从而获得了非对映体复合盐[RuCl(胺)-((R)-eta〜1-PPh_2(CH_2)_2CH(CH_3)-eta〜6 -C_6H_5)] BF_4。对于苯胺,哌啶,苄胺和丁胺络合物盐9-12(de = 82-90%),获得了良好的非对映选择性。已经通过X射线结构分析确定了8-10的绝对结构。发现苯胺和哌啶络合物盐9和10的主要非对映异构体的S_(RU),RC构型。盐9阳离子的侧链立体中心以及金属构型在低温和低温下均能长期稳定。在不同的解决方案中升高温度。

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