First regioselective iodocyclization reaction of 3-aryl-5-(prop-2-ynylthio)-1H-1,2,4-triazoles
摘要:
The regioselective iodocyclization reaction of 3-aryl-5-(prop-2-ynylthio)-1H-1,2,4-triazoles is described for the first time. The iodocyclization reaction of 3-aryl-5-(prop-2-ynylthio)-1H-1,2,4-triazoles using molecular iodine afforded diiodo-compound which on Cul-catalyzed intramolecular C-N coupling reaction gave six-membered 2-aryl-51141,2,4]triazolo[5,1-b][1,3]thiazines, whereas, the five membered 3-aryl-5,6-dihydrothiazolo[2,3-c][1,2,4]triazoles were obtained exclusively when the iodocyclization reaction of 3-aryl-5-(prop-2-ynylthio)-1H-1,2,4-triazoles was carried out using NIS. (C) 2015 Elsevier Ltd. All rights reserved.
Sodium Hydroxide: a Mild and Inexpensive Catalyst for the Regioselective Synthesis of 2-Substituted 5-Methylthiazolo[3,2-b]-s-triazoles‡
作者:Majid. M. Heravi、Mahmood Tajbakhsh
DOI:10.1039/a802038h
日期:——
The facile and regioselective synthesis of 2-substituted 5-methylthiazolo[3,2-b]-s-triazoles has been performed by the catalytic action of NaOH on 3-propynylthio-s-triazoles.
Acid Catalyzed, Regioselective Synthesis of 2-Substituted 5-Methylthiazolo[3,2-B]-S-Triazoles
作者:Majid M. Heravi、Mahmood Tajbakhsh、Mohammad Rahimizadeh、Abolghasem Davoodnia、Kiumars Aghapoor
DOI:10.1080/00397919908086605
日期:1999.12.1
Abstract The facile and regioselective synthesis of 2-substituted 5-methylthia-zolo[3,2-b]triazoles has been performed by the catalytic action of H2SO4 on the corresponding propynylthio derivatives.
Regioselective synthesis of 6-benzylthiazolo[3,2-b]1,2,4-triazoles during Sonogashira coupling
作者:Majid M. Heravi、Ali Kivanloo、Mohammad Rahimzadeh、Mehdi Bakavoli、Mitra Ghassemzadeh、Bernhard Neumüller
DOI:10.1016/j.tetlet.2005.01.091
日期:2005.3
The reaction of 3-merciptopropargyl-1,2,4-ti-iazoles with various iodobenzenes catalyzed by Pd-Cu leads to the regioselective formation of 6-beiizyltliiazolo[3,2-b]1,2,4-triazoles 4. The structure of 4d was confirmed by X-ray analysis. (C) 2005 Elsevier Ltd. All rights reserved.