An efficient Cs2CO3‐catalyzedoxidativecoupling of thiols with phosphonates and arenes that uses molecular oxygen as the oxidant is described. These reactions provide not only a novel alkali metal salt catalyzed aerobic oxidation, but also an efficient approach to thiophosphates and sulfenylarenes, which are ubiquitously found in pharmaceuticals and pesticides. The reaction proceeds under simple and
描述了使用分子氧作为氧化剂的高效Cs 2 CO 3催化的硫醇与膦酸酯和芳烃的氧化偶联。这些反应不仅提供了一种新颖的碱金属盐催化的好氧氧化反应,而且提供了一种在制药和农药中普遍发现的硫代磷酸盐和亚硫基芳烃的有效方法。该反应在简单温和的反应条件下进行,可耐受各种官能团,适用于生物活性分子的后期合成和修饰。
Practical Reagents and Methods for Nucleophilic and Electrophilic Phosphorothiolations
作者:Szabolcs Kovács、Bilguun Bayarmagnai、Alexandre Aillerie、Lukas J. Gooßen
DOI:10.1002/adsc.201701549
日期:2018.5.16
using nucleophilic and electrophilicreagents. The nucleophilic reagent, tetramethylammonium O,O‐dimethyl phosphorothioate, was synthesized in near‐quantitative yield from Me3SiP(O)(OMe)2, elemental sulfur and Me4NF. Its umpolung with N‐bromophthalimide provided the electrophilicreagent, O,O‐dimethyl‐S‐(N‐phthalimido)phosphorothioate. Complementary methods based on these reagents enable the phosphorothiolation
Exploring new catalysts for efficient organic synthesis is among the most attractive topics in chemistry. Here, using Ni(OAc)2/LA as catalyst (LA: Lewis acid), a novel catalyst strategy was developed for oxidative coupling of thiols and phosphonates to phosphorothioates with oxygen oxidant. The present study discloses that when Ni(OAc)2 alone was employed as the catalyst, the reaction proceeded very
Synthesis of Thiophosphates by Coupling of Phosphates with Bunte Salts under Mild Conditions
作者:Sen Lin、Zhaohua Yan、Cong Min、Rongxing Zhang、Qian Liu
DOI:10.1055/s-0037-1609556
日期:2018.9
A simple, green, and efficient method has been developed for the preparation of thiophosphates with sodium S-benzyl thiosulfates. The method uses an NaBr-catalyzed coupling reaction of Buntesalts with phosphonates in the presence of an acid and hydrogen peroxide (30%), and the desired products were obtained in good yields.