Sodium Hydroxide Catalyzed <i>N</i>-Alkylation of (Hetero) Aromatic Primary Amines and N<sub>1</sub>,C<sub>5</sub>-Dialkylation of 4-Phenyl-2-aminothiazoles with Benzyl Alcohols
作者:Ramachandra Reddy Donthiri、Venkatanarayana Pappula、Darapaneni Chandra Mohan、Hiren H. Gaywala、Subbarayappa Adimurthy
DOI:10.1021/jo400834h
日期:2013.7.5
of a catalytic amount of NaOH, the selective N-alkylation of various heteroaromatic primary amines is reported. With 1 equiv of NaOH, N1,C5-dialkylation of 4-phenyl-2-aminothiazoles has been investigated. Reaction of in situ generated aldehyde with amine yields the N-alkylated and N1,C5-dialkylated products through hydride ion transformation from alcohol.
Nickel(II)–N<sup>Λ</sup>N<sup>Λ</sup>O Pincer Type Complex-Catalyzed N-alkylation of Amines with Alcohols via the Hydrogen Autotransfer Reaction
作者:Gunasekaran Balamurugan、Rengan Ramesh、Jan Grzegorz Malecki
DOI:10.1021/acs.joc.0c00530
日期:2020.6.5
A highly sustainable catalytic protocol for the coupling of alcohols and amines for selective monoalkylated amines using Ni(II)–NΛNΛO pincer type complexes through the borrowing hydrogen methodology is described. An array of Ni(II) catalysts (1–3) was synthesized and characterized by various spectral and analytical methods. Furthermore, the distorted square planar geometry of the complexes (1 and 2)
reactions of amines/amides with alcohols in the past. By employing the aerobicrelayracemethodology with Pd‐catalyzed aerobicalcohol oxidation being a more effective protocol for alcohol activation, ligand‐free homogeneous palladiums are successfully used as active catalysts in the dehydrative N‐alkylation reactions, giving high yields and selectivities of the alkylated amides and amines. Mechanistic
Catalyst-free autocatalyzedN-alkylation of heteroarylamines with alcohols is achieved by tautomerization-induced ready generation of carbonyl intermediates from alcoholsviaTM-free MPV–O reaction.
Efficient and versatile catalysis of N-alkylation of heterocyclic amines with alcohols and one-pot synthesis of 2-aryl substituted benzazoles with newly designed ruthenium(<scp>ii</scp>) complexes of PNS thiosemicarbazones
作者:Rangasamy Ramachandran、Govindan Prakash、Sellappan Selvamurugan、Periasamy Viswanathamurthi、Jan Grzegorz Malecki、Venkatachalam Ramkumar
DOI:10.1039/c4dt00006d
日期:——
or As, L = 2-(2-(diphenylphosphino)benzylidene) thiosemicarbazone (PNS-H), 2-(2-(diphenylphosphino)benzylidene)-N-methylthiosemicarbazone (PNS-Me), 2-(2-(diphenylphosphino)benzylidene)-N-phenylthiosemicarbazone (PNS-Ph)) have been synthesized and characterized by elemental analysis and spectroscopy (IR, UV-Vis, 1H, 13C, 31P-NMR) as well as ESI mass spectrometry. The molecular structures of complexes