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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Synthesis and Oxidation of Ruthenium Allyl Thioether Complexes Bearing Phosphite and Phosphonite Coligands (1)
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Synthesis and Oxidation of Ruthenium Allyl Thioether Complexes Bearing Phosphite and Phosphonite Coligands (1)

机译:含亚磷酸酯和亚膦酸酯配体的钌烯丙基硫醚配合物的合成和氧化(1)

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摘要

Halfsandwith ruthenium thiolate complexes bearing electron-withdrawing phosphite or phosphonite ligands were prepared from [CpRu(PPh_3)_2(SR)] (R = Ph, CH_2Ph, Me) and triphenylphosphite or (S, S)-bis(binaphthylphosphonito) ethane (bbpe), respectively. Reaction with 1-bromo-3-methyl-2-butene in the presence of NH_4PF_6 gave the corresponding allylthioether complexes [CpRu(PR'_3)_2(S(R)CH_2CH=CMe_2)] PF_6. Treatment with an excess of dimethyldioxirane (DMD) transformed the triphenylphosphite derivatives into diastereomeric (oxiranylmethyl) sulfoxide complexes with 18-80% de. NMR monitoring of the reaction revealed that the oxidant attacks the sulfur atom and the C=C double bond with comparable rates. Similar oxidation of the bbpe complexes gave mixtures of four diastereoisomers with ratios of (64 : 15 : 13 : 8) and (51 : 24 : 15 : 10), respectively.
机译:由[CpRu(PPh_3)_2(SR)](R = Ph,CH_2Ph,Me)和亚磷酸三苯酯或(S,S)-双(双萘基膦酸酯)乙烷(bbpe)制备带有沙原子的吸电子亚磷酸酯或亚膦酸酯配体的硫醇钌配合物半沙), 分别。在NH_4PF_6存在下与1-溴-3-甲基-2-丁烯反应,得到相应的烯丙基硫醚络合物[CpRu(PR'_3)_2(S(R)CH_2CH = CMe_2)] PF_6。用过量的二甲基二环氧乙烷(DMD)处理将亚磷酸三苯酯衍生物转化为de-为18-80%的非对映异构的(环氧乙烷基甲基)亚砜配合物。反应的NMR监测表明,氧化剂以可比的速率攻击硫原子和C = C双键。 bbpe配合物的类似氧化产生四种非对映异构体的混合物,比例分别为(64:15:13:8)和(51:24:15:10)。

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