在本文中,我们描述了通过C-O键的活化,铁催化的烯基和芳基氨基甲酸酯的硼酸酯化反应。该方案显示出高效率,广泛的底物范围以及生物相关化合物的后期硼化,因此在药物化学中提供了潜在的应用。而且,该方法能够使酚衍生物进行正交转化,并且还为合成多取代的芳烃提供了良好的机会。初步的机理研究表明,通过自由基途径的Fe II / Fe III催化循环可能与反应有关。
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
Highly Efficient and Convenient Access to Phosphinates via CHCl<sub>3</sub>
-Assisted Direct Phosphorylation between R<sub>2</sub>
P(O)H and ROH by Phosphonium Salt Catalysis
作者:Xiaojun Yu、Song Zhang、Zhiyu Jiang、Hong-Su Zhang、Tianli Wang
DOI:10.1002/ejoc.202000385
日期:2020.5.29
A mild, efficient, convenient, and scalable method to synthesize phosphinatesviadirectphosphorylationbetween R2P(O)H and ROH was developed. Preliminary mechanistic studies suggest that a carbene‐involving process from CHCl3 to CH2Cl2 facilitates the phosphorylation.
efficient N,N′-carbonyl diimidazole-catalyzed protocol for the direct esterification of P(O)-OH compounds using phenols as efficient esterification reagents is illustrated. It is a simple way to synthesis a broad spectrum of functionalized O-aryl phosphinates, phosphonates, and phosphates from basic startingmaterials with moderate to excellent yields.
A novel copper-catalyzed method for the direct esterification of P(O)–OH compounds using phenols as efficient esterification reagents is illustrated. It is a simple way to generate a broad spectrum of functionalized O-aryl phosphinates, phosphonates, and phosphates from basic starting materials with moderate to excellent yields.