Z-芳基二甲基(1),甲基苯基(2)和联苯(3)与X-苯胺的次膦酸盐二甲基亚砜在60.0°C下进行了动力学研究。动力学结果产生基本法线氘 涉及氘的动力学同位素效应(DKIE) 苯胺 (XC 6 H 4 ND 2)亲核试剂k H / k D = 1.03-1.17、1.15-1.29和1.24-1.51,以及交叉相互作用常数(CIC),ρ XZ= 0.37,0.34,和0.65 1,2,和3,分别。配体(R 1和R 2)对反应速率的空间效应起作用,但与其他反应相比要小得多次膦酸酯系统。基于CICs的正号,提出了一种具有限速的离去基团从中间体中逐出的逐步机制。主要的正面亲核攻击通过氢键合的,四-中心型过渡状态,提出了原代正常DKIEs和CIC的用于大幅度的基础上2和3,而这两个正面和背面攻击提出相对小的一次正常DKIEs的用于基础上1。
Redox-Neutral P(O)–N Coupling between P(O)–H Compounds and Azides via Dual Copper and Photoredox Catalysis
作者:Yanan Wu、Ken Chen、Xia Ge、Panpan Ma、Zhiyuan Xu、Hongjian Lu、Guigen Li
DOI:10.1021/acs.orglett.0c02207
日期:2020.8.7
We report a redox-neutral P(O)–N coupling reaction of P(O)–H compounds with azides via photoredox and copper catalysis, providing new access to useful phosphinamides, phosphonamides, and phosphoramides. This transformation tolerates a wide range of nucleophilic functionalities including alcohol and amine nucleophiles, which makes up for the deficiency of classical nitrogen nucleophilic substitution
Ligand-free copper-catalyzed denitrogenative arylation of phosphorylamides with arylhydrazines
作者:Qiao Zhu、Shiying Che、Zhenghong Luo、Zijian Zhao
DOI:10.1080/00397911.2020.1725577
日期:2020.4.2
Abstract A straightforward arylation of phosphorylamides with arylhydrazines hydrochloride was herein demonstrated. The protocol proceeded in the presence of a catalytic loading of Cu(OAc)2 as the catalyst, DTBP as the external oxidant and Cs2CO3 as the base, but without any ligands. And a series of N-aryl phosphorylamides were successfully obtained in high efficiency (up to 93% yields) with good substituents
The Chan-Evans-Lam N -arylation of phosphonic/phosphinic amides
作者:Yuqin Xu、Qiong Su、Wanrong Dong、Zhihong Peng、Delie An
DOI:10.1016/j.tet.2017.06.028
日期:2017.8
A stoichiometric copper(II)-mediated arylation protocol of phosphinamides and phosphonamides was herein demonstrated. Various unreported N-aryl phosphinamides and phosphonamides were successfully prepared through Chan-Evans-Lam reaction with high efficiency (up to 88% yields) and good functional groups tolerance (30 examples) in the absence of any ligands or co-catalysts.
Tf2O-Mediated P(O)–N Bond Formation of Either P(O)–OH or P(O)–H Reagents with Multitype Amines
作者:Da-Wei Shi、Hui-Qi Yue、Ming Li、Jie Liu、Chang-Cheng Wang、Shang-Dong Yang、Bin Yang
DOI:10.1021/acs.joc.3c02970
日期:2024.5.17
a Tf2O-mediated approach for the direct amination of either P(O)–OH or P(O)–H reagents with a variety of aliphatic or aromatic amines. Without the requirement of precious metals and toxic reagents, this protocol provides an alternative route to various phosphinamides and phosphoramides. The reaction proceeds under simple and mildconditions and can be effectively scaled up with similar efficiency.
我们开发了一种 Tf 2 O 介导的方法,用于将 P(O)–OH 或 P(O)–H 试剂与各种脂肪族或芳香族胺直接胺化。该方案不需要贵金属和有毒试剂,为各种膦酰胺和磷酰胺提供了替代途径。该反应在简单温和的条件下进行,并且可以以类似的效率有效地扩大规模。
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