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.
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
Ruthenium(<scp>ii</scp>) complexes containing a phosphine-functionalized thiosemicarbazone ligand: synthesis, structures and catalytic C–N bond formation reactions via N-alkylation
作者:Rangasamy Ramachandran、Govindan Prakash、Sellappan Selvamurugan、Periasamy Viswanathamurthi、Jan Grzegorz Malecki、Wolfgang Linert、Alexey Gusev
DOI:10.1039/c4ra14797a
日期:——
We report the coordination flexibility of phosphino-thiosemicarbazone in ruthenium(ii) complexes, together with their catalytic properties with regards to N-alkylation.
我们报告了磷硫腙类配体在钌(II)配合物中的配位灵活性,以及它们在N-烷基化反应中的催化性能。
Copper‐catalyzed one‐pot coupling reactions of aldehydes (ketones), tosylhydrazide and 2‐amino(benzo)thiazoles: An efficient strategy for the synthesis of
<i>N</i>
‐alkylated (benzo)thiazoles
作者:Zengyang Xie、Ruijiao Chen、Mingfang Ma、Lingdong Kong、Jun Liu、Cunde Wang
DOI:10.1002/aoc.5124
日期:2019.10
An efficient and practical C–N bond formation methodology for the synthesis of N‐alkylated (benzo)thiazoles was developed, via the copper‐catalyzed one‐pot two‐step reactions of 2‐amino(benzo)thiazoles and aldehydes (ketones) with tosylhydrazide. This cross‐coupling reaction proceeded smoothly and tolerated a broad range of functional groups (46 examples). A variety of functionalized N‐alkylated (benzo)thiazoles