Regioselective, Photocatalytic α-Functionalization of Amines
摘要:
Photocatalytic alpha-functionalization of amines provides a mild and atom-economical means to synthesize alpha-branched amines. Prior examples featured symmetrical or electronically biased substrates. Here we report a controllable alpha-functionalization of amines in which regioselectivity can be tuned with minor changes to the reaction conditions.
Copper-Catalyzed <i>N</i>- and <i>O</i>-Alkylation of Amines and Phenols using Alkylborane Reagents
作者:Shunsuke Sueki、Yoichiro Kuninobu
DOI:10.1021/ol400323z
日期:2013.4.5
in the presence of a catalytic amount of copper(II) acetate Cu(OAc)2 and di-tert-butyl peroxide, a cross-coupling reaction proceeded and alkylated amines were obtained in good to excellent yields. Phenols are also applicable for this reaction, and the corresponding alkyl aryl ethers were produced.
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。
Efficient and chemoselective direct reductive amination of aromatic aldehydes catalyzed by oxo–rhenium complexes containing heterocyclic ligands
作者:Joana R. Bernardo、Sara C.A. Sousa、Pedro R. Florindo、Mariusz Wolff、Barbara Machura、Ana C. Fernandes
DOI:10.1016/j.tet.2013.08.016
日期:2013.10
This work describes the catalytic activity of 17 oxo–rhenium complexescontainingheterocyclicligands in the direct reductive amination of 4-nitrobenzaldehyde with 4-chloroaniline, using phenylsilane as reducing agent. In general, all of the catalysts tested gave excellent yields of the secondary amine, although, the best result was obtained with the catalytic system PhSiH3/ReOBr2(Hhmpbta)(PPh3) (2
Efficient and Highly Chemoselective Direct Reductive Amination of Aldehydes using the System Silane/Oxorhenium Complexes
作者:Sara C. A. Sousa、Ana C. Fernandes
DOI:10.1002/adsc.201000246
日期:2010.9.10
This work reports a novel method for direct reductive amination of aldehydes with silanes catalyzed by several high‐valent oxorhenium(V) and oxorhenium(VII) complexes. The catalytic system PhSiH3/ReIO2(PPh3)2 (2.5 mol%) was very efficient for the synthesis of secondary amines and highly chemoselective, tolerating a wide range of functional groups such as NO2, CF3, SO2R, CO2R, F, Cl, Br, I,
这项工作报告了一种新颖的方法,该方法通过几种高价的氧化or(V)和氧化or(VII)络合物催化的硅烷与硅烷直接还原胺化。催化体系PhSiH 3 /一体化组织2(PPH 3)2(2.5摩尔%)是仲胺的合成非常有效和高度化学选择性,容忍一个宽范围的官能团如 NO 2, CF 3, SO 2 R, CO 2 R,楼氯, BR, I,CN, OH, OCH 3, SCH 3, NCOR,和双键。该新方法还用于中等产率的叔胺合成中。
Nickel-Catalyzed Decarboxylation of Aryl Carbamates for Converting Phenols into Aromatic Amines
to accessing aromaticamines from an abundant feedstock, namely phenols. The most reliable catalytic method for converting phenols to aromaticamines uses an activating group, such as a trifluoromethane sulfonyl group. However, this activating group is eliminated as a leaving group during the amination process, resulting in significant waste. Our nickel-catalyzed decarboxylation reaction of aryl carbamates