Synthesis, characterization and resolution of racemic (2-methylsulfinyl)phenylphosphonic acid methyl ester via its cinchoninium salts
作者:Christelle Mauger、Serge Masson、Michel Vazeux、Jean-François Saint-Clair、Wanda H. Midura、Josef Drabowicz、Marian Mikolajczyk
DOI:10.1016/s0957-4166(01)00008-8
日期:2001.2
The synthesis of new (2-methylsulfinyl)phenylphosphonic acid methyl and dimethylesters in both racemic and non-racemic forms is reported. Resolution of the racemic phosphonic acid mono-ester 1 was accomplished via diastereomeric salt formation with cinchonine. The absolute stereochemistry of the phosphonic ester products was deduced from asymmetric sulfoxidation experiments and confirmed by chemical
Ortho-(methylsulfanyl)phenylphosphonates and derivatives: Synthesis and applications as mono- or bidentate ligands for the preparation of platinum complexes
with different platinum sources has been studied and the new platinum complexes obtained were characterized by NMRspectroscopy (1H, 13C, 31P and 195Pt). Three runs of experiments were performed. The first was the reaction of ligands 1 and 2 bearing one sulfide and a phosphonate diester functions with potassium tetrachloroplatinate. In the obtained complexes, two molecules of ligand chelate the metal only
通过[1,3]-或[1,4]-σ重排完成了在邻位带有硫基的六个苯基膦酸酯(和膦酸衍生物)的制备。已经研究了它们与不同铂源的络合,并通过NMR光谱(1 H,13 C,31 P和195 Pt)表征了所获得的新铂络合物。进行了三轮实验。首先是配体1和2的反应带有一个硫化物和一个膦酸酯二酯的四氯铂酸钾盐。在获得的配合物中,两个配体分子仅通过硫原子螯合金属。我们能够通过195 Pt和31 P NMR光谱观察到二氯甲基-(邻-磷酰基苄基)硫铂(II)络合物随时间的反式至顺式重排,产生了两个新物种,即顺式的非对映异构体-复杂的。在第二组实验中涉及的配体1,2和3带有一个硫化物或亚砜和一个膦酸二酯部分,顺铂和一当量的硝酸银。在所得的络合物中,铂由一分子配体的硫原子配位。在第三次运行,配体之间的反应4,5,和6轴承一种硫化物或亚砜和一种膦酸或一个膦单酯基,并导致顺铂二水形式ö,小号-Pt螯合物。