Preparation, structure and coordination properties of 3,3-bis(diisopropylamino)-3-thioxo-1-(2,4,6-tri-tert-butylphenyl)-1,3-diphosphapropene
作者:Hongze Liang、Shigekazu Ito、Masaaki Yoshifuji
DOI:10.1039/b305216h
日期:——
(Z)-1-Chloro-2-(2,4,6-tri-tert-butylphenyl)-2-phosphaethenyllithium was allowed to react with bis(diisopropylamino)phosphenium triflate to afford the corresponding 1,3-diphosphapropene which was converted to 3-thioxo-1,3-diphosphapropene [(Z)-Mes*PC(Cl)–P(S)(NiPr2)2]. The coordination properties of 3-thioxo-1,3-diphosphapropene were investigated with carbonyltungsten(0) and dichloroplatinum(II) reagents, and the molecular structure of the chelate dichloroplatinum(II) complex was unambiguously determined by X-ray crystallography together with the free ligand. The dichloroplatinum(II) complex underwent intramolecular cyclisation involving C–H activation to give a 5,7-di-tert-butyl-3,3-dimethyl-1-(phosphinomethyl)-1-phosphaindane derivative as well.
(Z)-1-氯-2-(2,4,6-三叔丁基苯基)-2-膦乙烯锂与双(二异丙胺)膦盐 triflate 反应,生成相应的 1,3-二膦丙烯,随后转化为 3-硫杂-1,3-二膦丙烯 [(Z)-Mes*PC(Cl)–P(S)(NiPr2)2]。研究了 3-硫杂-1,3-二膦丙烯与碳氧化钨(0)和二氯铂(II)试剂的配位特性,通过 X 射线晶体学明确确定了与自由配体的配合物二氯铂(II)复合物的分子结构。该二氯铂(II)复合物经历了涉及 C–H 活化的分子内环化反应,生成了一个 5,7-二叔丁基-3,3-二甲基-1-(膦甲基)-1-膦烷衍生物。