OXIDATIVE HYDROLYSIS OF PHOSPHORUS(V) ESTERS OF THIOLS BY PEROXYMONOSULFATE ION. REACTIONS OF PEROXYMONOSULFATE ION WITH PHOSPHORUS(V) ESTERS OF THIOLS
摘要:
Peroxymonosulfate ion, HSO5-, as Oxone, readily converts phosphorus(V) esters of thiols into the phosphorus(V) and sulfonic acids. The esters were Ph2PO . SC6H4R(p) with R=MeO (1a), Me (1b), H (1c), Cl (1d) and NO2 (1e), (EtO)(2)PO . SPh (2), Ph2OI . SEt (3) and PhPO(OEt)SEt (4). Reactions are first order in each reactant and second-order rate constants, k(2), for 1a-e fit the Hammett equation with rho=-0.46. The rate constants increase markedly with increasing water content of H2O-MeCN, the activation enthalpies are low and the entropies are negative. Despite the low value of - rho, these esters are much less reactive than thiol ethers, but the rate constants of reactions of these compounds and acyl thiols qualitatively follow the ionization potentials of the ethers and the esters. (C) 1997 by John Wiley & Sons. Ltd.
Acid/Phosphide-Induced Radical Route to Alkyl and Alkenyl Sulfides and Phosphonothioates from Sodium Arylsulfinates in Water
作者:Ya-mei Lin、Guo-ping Lu、Gui-xiang Wang、Wen-bin Yi
DOI:10.1021/acs.joc.6b02459
日期:2017.1.6
can in situ generate arylsulfenyl radicals. These radicals have high reactivity to react with alkynes, alkenes, and H-phosphine oxides for the synthesis of alkyl and alkenyl sulfides and phosphonothioates. The control experiments and quantum calculations are also performed to gain insights into the generation mechanism of arylsulfenyl radicals. Notably, the chemistry is free of thiol odors, organic solvents
economical phosphorylation of thiols has been achieved via halogen- and metal-free K2CO3-promoted aerobic oxidative cross-coupling of trialkyl phosphites, dimethyl phenylphosphonite, or methyl diphenylphosphinite with thiophenols using air as the oxidant at room temperature. This transformation provides a straightforward route to the construction of phosphorus–sulfur bonds with wide functional group compatibility
通过在室温下使用空气作为氧化剂,通过无卤和无金属的K 2 CO 3促进亚磷酸三烷基酯,二甲基苯基亚膦酸酯或甲基二苯基亚膦酸酯与硫代苯酚的需氧氧化交叉偶联,实现了硫醇的便捷,实用和经济的磷酸化。这种转变为构建具有广泛官能团相容性的磷硫键提供了一条简单的途径,该方法可提供高达94%的收率的硫代磷酸酯。
A scalable electrochemical dehydrogenative cross-coupling of P(O)H compounds with RSH/ROH
作者:Yujun Li、Qi Yang、Liquan Yang、Ning Lei、Ke Zheng
DOI:10.1039/c9cc01378d
日期:——
A practical, scalable electrochemical dehydrogenative cross-coupling of P(O)H compounds with thiols, phenols and alcohols in both an undivided cell and a continuous-flow setup is disclosed. Its broad substrate scope (>50 examples), good functional-group tolerance and scalability (>10 g) show potential for practical synthesis. A preliminary mechanistic study suggests that the phosphorus radicals are
Dimethyl sulfoxide as a mild oxidant in S–P(O) bond construction: simple and metal-free approaches to phosphinothioates
作者:Jian-Guo Sun、Wei-Zhi Weng、Ping Li、Bo Zhang
DOI:10.1039/c6gc03115c
日期:——
In the presence of dimethylsulfoxide (DMSO) as the mild oxidant and reaction medium, a simple and efficient protocol has been developed for the preparation of phosphinothioates via oxidative dehydrogenative...