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.
Synthesis of heteroleptic copper(I) complexes with phosphine-functionalized thiosemicarbazones: An efficient catalyst for regioselective N -alkylation reactions
作者:Rangasamy Ramachandran、Govindan Prakash、Paranthaman Vijayan、Periasamy Viswanathamurthi、Jan Grzegorz Malecki
DOI:10.1016/j.ica.2017.05.003
日期:2017.8
spectral and analytical technique. The single-crystal X-ray diffraction study of complexes 2 and 3 confirmed the formation of complexes with Cu(I) ion, coordinated through P,N,S-donor atoms from the phosphino-thiosemicarbazone ligands. All the copper(I) complexes have been demonstrated as highly efficient catalysts for the synthesis of N-alkylated heterocyclic amine by the coupling of primary amines with
Iron phthalocyanine as an efficient and versatile catalyst for N-alkylation of heterocyclic amines with alcohols: one-pot synthesis of 2-substituted benzimidazoles, benzothiazoles and benzoxazoles
An efficient and versatile iron phthalocyanine catalyzed method has been developed for N-alkylation of various amines with alcohols. Readily available alcohols were used as alkylating agents for direct N-alkylation of aminobenzothiazoles, aminopyridines and aminopyrimidines. N-Alkylation of ortho-substituted anilines (–NH2, –SH and –OH) led to the synthesis of 2-substituted benzimidazoles, benzothiazoles
Ruthenium(II) complexes containing phosphino hydrazone/thiosemicarbazone ligand: An efficient catalyst for regioselective N-alkylation of amine via borrowing hydrogen methodology
Abstract In the aspect of more effective ruthenium based catalyst design, three new ruthenium(II) phosphino-hydrazone/thiosemicarbazone complexes (1–3) have been synthesized by the reactions of cis-[RuCl2(dmso)4] or [RuHCl(CO)(AsPh3)3] with deprotonated 2-(2-(diphenylphosphino)benzylidene)-2-thiophenecarboxylic acid hydrazone (PNO-Thy) or 2-(2-(diphenylphosphino)benzylidene)-4-phenyl-3-thiosemicarbazone