Direct arylation of tertiary amines via aryne intermediates using diaryliodonium salts
作者:Zhiang Zhang、Xunshen Wu、Jianwei Han、Wenjun Wu、Limin Wang
DOI:10.1016/j.tetlet.2018.03.067
日期:2018.5
With a strategy by usingdiaryliodoniumsalts as the precursors of benzynes, direct N-arylation of tertiary amines with diaryliodoniumsalts was reported. Thus, the desired aromatic tertiary amines with a wide range of substituents were synthesized in moderate to excellent yields of 55–91%.
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。
Reductive amination of ketones/aldehydes with amines using BH<sub>3</sub>N(C<sub>2</sub>H<sub>5</sub>)<sub>3</sub> as a reductant
作者:Qizhuang Zou、Fei Liu、Tianxiang Zhao、Xingbang Hu
DOI:10.1039/d1cc02618f
日期:——
first example of efficientreductiveamination of ketones/aldehydes with amines using BH3N(C2H5)3 as a catalyst and a reductant under mild conditions, affording various tertiary and secondary amines in excellent yields. A mechanistic study indicates that BH3N(C2H5)3 plays a dual function role of promoting imine and iminium formation and serving as a reductant in reductiveamination.
在此,我们报告了使用 BH 3 N(C 2 H 5 ) 3作为催化剂和还原剂在温和条件下用胺有效还原胺化酮/醛的第一个例子,以优异的产率提供各种叔胺和仲胺。机理研究表明,BH 3 N(C 2 H 5 ) 3具有促进亚胺和亚胺形成以及在还原胺化中作为还原剂的双重作用。
Molecular Addition Compounds. 10. Borane Adducts with <i>N</i>,<i>N</i>-Dialkylanilines for Hydroboration
作者:Herbert C. Brown、Marek Zaidlewicz、Pramod V. Dalvi
DOI:10.1021/om980418u
日期:1998.9.1
Borane adducts with selected N,N-dialkylanilines have been prepared and examined as hydroborating agents. The adduct H3B:NPhPri2 is a solid, considered less desirable than liquid adducts as hydroborating agents. Fortunately, the adducts H3B:NPhBuiMe, H3B:NPhPriMe, H3B:NPhPriEt, and H3B:NPhPriPrn are liquids above 0 °C, hydroborating 1-octene in tetrahydrofuran in less than 1 h at room temperature.
Sodium Triethylborohydride-Catalyzed Controlled Reduction of Unactivated Amides to Secondary or Tertiary Amines
作者:Wubing Yao、Lili He、Deman Han、Aiguo Zhong
DOI:10.1021/acs.joc.9b02211
日期:2019.11.15
The first transition-metal-free catalytic protocol for controlled reduction of amide functions using cheap and bench-stable hydrosilanes as reducing agents has been established. By altering the hydrosilane and solvent, the new method enables the selective cleavage of unactivated C-O bonds in amides and allows the C-N bonds to selectively break via the deacylated cleavage. Overall, this novel process