Base-promoted N-alkylation using formamides as the N-sources in neat water
摘要:
An efficient catalyst-free, alternative method for the C-N bond formation reaction of alkyl electrophiles using formamides as the N-sources was achieved under mild conditions. The reaction possesses the advantages of a broad range of substrates scope and wide functional group tolerance. It should also be noted that this process was performed using the environmentally benign water as the sole solvent, and high yield can also be achieved in ten-gram scale. (C) 2013 Elsevier Ltd. All rights reserved.
A Simple and Efficient Strategy To Enhance the Antioxidant Activities of Amino-Substituted Glutathione Peroxidase Mimics
作者:Krishna P. Bhabak、Govindasamy Mugesh
DOI:10.1002/chem.200800963
日期:2008.9.26
The glutathione peroxidase (GPx) activities of some diaryl diselenides incorporating tertiary amino groups were studied with H(2)O(2), Cum-OOH, and tBuOOH as substrates and with PhSH as thiol co-substrate. Simple replacement of a hydrogen atom with a methoxy group dramatically enhances the GPx activity. The introduction of methoxy substituents ortho to selenium in N,N-dialkylbenzylamine-based compounds
Highly efficient Amination in Neat Water of Benzyl Chlorides with Dialkylformamides Catalysed by <i>N</i>-Heterocyclic Carbene-Palladium(II)-1-Methylimidazole Complex
作者:Wen-Xin Chen、Cai-Yun Zhang、Jian-Mei Lu
DOI:10.3184/174751913x13787959859344
日期:2013.10
Dialkylformamides are excellent N-sources in the amination of benzylchlorides when catalysed by a NHC-Pd(II)-Im complex. In the presence of NaOH and the catalyst, variously substituted benzylchlorides and five different dialkylformamides reacted smoothly to afford the corresponding N,N-dialkyl-benzylamines in good to almost quantitative yields in eco-friendly solvent water at 50 °C within 3 h.
Simple Metal-Free Direct Reductive Amination Using Hydrosilatrane to Form Secondary and Tertiary Amines
作者:Sami E. Varjosaari、Vladislav Skrypai、Paolo Suating、Joseph J. M. Hurley、Ashley M. De Lio、Thomas M. Gilbert、Marc J. Adler
DOI:10.1002/adsc.201700079
日期:2017.6.6
This work describes the use of cheap, safe, and easy-to-handle hydrosilatrane as the reductant in direct reductive amination reactions. This efficient method enables a facile, metal-free access to secondary and tertiaryaminesfrom a wide range of aldehydes and ketones, with the synthesis of tertiaryamines requiring no additives at all. This reaction demonstrates excellent functional group tolerance
Consecutive β,β′‐Selective C(sp
<sup>3</sup>
)−H Silylation of Tertiary Amines with Dihydrosilanes Catalyzed by B(C
<sub>6</sub>
F
<sub>5</sub>
)
<sub>3</sub>
the two‐fold C(sp3)−H silylation of various trialkylamine derivatives with dihydrosilanes, furnishing the corresponding 4‐silapiperidines in decent yields. The multi‐step reaction cascade involves amine‐to‐enamine dehydrogenation at two alkyl residues and two electrophilic silylation reactions of those enamines, one inter‐ and one intramolecular.