Nucleophilic substitution reactions of diethyl 4-nitrophenyl phosphate triester: Kinetics and mechanism
作者:Enrique A. Castro、Daniela Ugarte、M. Fernanda Rojas、Paulina Pavez、José G. Santos
DOI:10.1002/kin.20605
日期:2011.12
Brønsted‐type plot (log kN vs. pKa nucleophile) obtained for the phenolysis is linear with slope β=0.21; no break was found at pKa 7.5, consistent with a concerted mechanism. The Brønsted‐type plots for the SA aminolysis and pyridinolysis are linear with slopes β=0.39 and 0.43, respectively, also suggesting concerted processes. The concerted mechanisms for the latter reactions are proposed on the basis
Phosphoramidate synthesis via copper-catalysed aerobic oxidative coupling of amines and H-phosphonates
作者:Jamie Fraser、Laura J. Wilson、Rebecca K. Blundell、Christopher J. Hayes
DOI:10.1039/c3cc45680c
日期:——
The copper-catalysed oxidative coupling of amines and H-phosphonates to produce phosphoramidates has been achieved using CuI as the catalyst and O2 (present in air) as the sole oxidant.
Please note the following corrections in the manuscript and Supporting Information: In Scheme 3, footnote a, a reaction condition was omitted. See corrected Scheme 3 below. Footnote d has been added to indicate the use of 0.5 mL of the corresponding alcohols for some substrates. In the Supporting Information (page s-4), the amount of H2O2 used for the reaction in typical procedures A–C was omitted
请注意手稿和支持信息中的以下更正:在方案3的脚注a中,省略了反应条件。请参阅下面的更正方案3。添加了脚注d,以指示对某些底物使用0.5 mL相应的醇。在《支持信息》(第s-4页)中,省略了典型步骤A–C中用于反应的H 2 O 2量。对于典型的步骤A–C,不包括用于少量底物的酒精量。此信息已包含在更正的版本中。a反应条件:1(0.72 mmol),4(2.17 mmol),I 2(10 mol%),H 2 O 2(1当量)基于1 H NMR数据的转化。分离的产率。使用0.5mL的相应的醇。a反应条件:1(0.72mmol),4(2.17mmol),I 2(10mol%),H 2 O 2(1当量)。基于1 H NMR数据的转化。孤立的产量。使用0.5mL的相应醇。更正的支持信息版本。可通过Internet(http://pubs.acs.org)免费获得此材料。这篇文章被2个出版物引用。a反应条件:1(0
Reinvestigation of the iodine-mediated phosphoramidation reaction of amines and P(OR)<sub>3</sub> and its synthetic applications
study on the iodine-mediated phosphoramidation reaction of amines and trialkyl phosphites was conducted, which not only disclosed the factors affecting the reaction but also revealed that it could proceed smoothly in CH2Cl2 at room temperature in open air. Using this method, various phosphoramidates with different aliphatic amines and aromatic amines were synthesized in good to excellent yields. Our
Phosphorylation of amines, alcohols, and sulfoximines are accomplished using molecular iodine as a catalyst and H2O2 as the sole oxidant under mild reaction conditions. This method provides an easy route for synthesizing a variety of phosphoramidates, phosphorus triesters and sulfoximine-derived phosphoramidates which are of biological importance.
在温和的反应条件下,使用分子碘作为催化剂并使用H 2 O 2作为唯一的氧化剂,可以实现胺,醇和亚磺酰亚胺的磷酸化。该方法提供了一种容易的途径,用于合成具有生物学重要性的多种氨基磷酸酯,三酯磷和源自亚磺酰亚胺的氨基磷酸酯。