Novel Solid-Phase Parallel Synthesis of <i>N</i>-Substituted-2-aminobenzo [<i>d</i>]thiazole Derivatives via Cyclization Reactions of 2-Iodophenyl Thiourea Intermediate Resin
作者:Seul-Gi Kim、Se-Lin Jung、Gee-Hyung Lee、Young-Dae Gong
DOI:10.1021/co300112b
日期:2013.1.14
N-sulfonyl-2-aminobenzo[d]thiazole derivatives. The key step in this procedure involves the preparation of polymer-bound 2-aminobenzo[d]thiazole resins 5 by cyclization reaction of 2-iodophenyl thiourea resin 3. The resin-bound 2-iodophenyl thiourea 3 is produced by addition of 2-iodophenyl isothiocyanate 2 to the amine-terminated linker amide resin 1. These core skeleton 2-aminobenzo[d]thiazole resins 5 undergo
已经开发了用于合成N-烷基,N-酰基和N-磺酰基-2-氨基苯并[ d ]噻唑衍生物的新型固相方法。该过程中的关键步骤涉及通过2-碘苯基硫脲树脂3的环化反应制备与聚合物结合的2-氨基苯并[ d ]噻唑树脂5。通过将2-碘苯基异硫氰酸酯2添加到胺封端的连接酰胺树脂1中来生产树脂结合的2-碘苯基硫脲3。这些核心骨架的2-氨基苯并[ d ]噻唑树脂5经历与各种亲电子,如烷基卤,酰基氯,和磺酰氯官能化反应以产生Ñ -烷基,Ñ -酰基,和Ñ磺酰基-2-氨基苯并[ d ]噻唑树脂6,7,和8,分别。最后,Ñ -烷基,Ñ -酰基,和Ñ磺酰基-2-氨基苯并[ d ]噻唑衍生物9,10,和11,然后在良好的产率和纯度通过各树脂的切割产生6,7,和8 在二氯甲烷(DCM)中使用三氟乙酸(TFA)。
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
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