Direct
<i>N‐</i>
Alkylation/Fluoroalkylation of Amines Using Carboxylic Acids via Transition‐Metal‐Free Catalysis
作者:Chunlei Lu、Zetian Qiu、Maojie Xuan、Yan Huang、Yongjia Lou、Yiling Zhu、Hao Shen、Bo‐Lin Lin
DOI:10.1002/adsc.202000679
日期:2020.10.6
scalable protocol of direct N‐mono/di‐alkyl/fluoroalkylation of primary/secondary amines has been constructed with various carboxylicacids as coupling agents under the catalysis of a simple air‐tolerant inorganic salt, K3PO4. Advantageous features include 100 examples, 10 drugs and drug‐like amines, fluorinated complex tertiary amines, gram‐scale synthesis and isotope‐labelling amine, thus demonstrating
在简单的耐空气无机盐K 3 PO 4的催化下,已使用各种羧酸作为偶联剂构建了伯/仲胺直接N-单/二烷基/氟烷基化的可扩展方案。有利的特征包括100种实例,10种药物和类药物胺,氟化复杂的叔胺,克级合成和同位素标记胺,因此证明了该方法在工业上的潜在适用性。与减少酰胺中间体所需的传统反应性金属氢化物或硼氢化物相比,反应性较小的氢化硅的参与可能有助于显着的官能团相容性。
Use of acetate as a leaving group in palladium-catalyzed nucleophilic substitution of benzylic esters
作者:Masashi Yokogi、Ryoichi Kuwano
DOI:10.1016/j.tetlet.2007.06.157
日期:2007.8
The palladium complex prepared in situ from [Pd(η3-C3H5)(cod)]BF4 and bidentate phosphine DPPF was a good catalyst for the nucleophilicsubstitution of benzyl acetate. Significant acceleration of the palladium-catalyzedsubstitution was observed when an alcohol was employed as a reaction solvent. The palladium catalyst was effective for the benzylation of various stabilized carbanions, amines, and
钯在从[钯(η原位络合物制备的3 -C 3 H ^ 5)(COD)] BF 4和双齿膦DPPF是一个很好的用于乙酸苄酯的亲核取代的催化剂。当将醇用作反应溶剂时,观察到钯催化的取代的显着加速。钯催化剂可有效地用于各种稳定化碳负离子,胺和苯亚磺酸盐的苄基乙酸酯的苄基化反应。
Palladium-Catalyzed Nucleophilic Benzylic Substitutions of Benzylic Esters
作者:Ryoichi Kuwano、Yutaka Kondo、Yosuke Matsuyama
DOI:10.1021/ja037735z
日期:2003.10.1
A palladium complex generated in situ from [Pd(eta3-C3H5)(cod)]BF4 and DPPF is a good catalyst for benzylic alkylation of benzyl methyl carbonate with the carbanion of dimethyl malonates. The catalytic reaction is applicable to a wide range of the benzylations of benzylic esters with malonates. The catalytic activity was heavily affected by the bite angle of the bidentate phosphine ligand on palladium