Facile and quick synthesis of 1-monosubstituted aryl 1,2,3-triazoles: a copper-free [3+2] cycloaddition
摘要:
An efficient copper-free synthesis of 1-monosubstituted aryl 1,2,3-triazoles from sodium acetylide and aryl azides was developed, which was found suitable for various aryl azides and completed within 15 min at room temperature with moderate to excellent yields. (C) 2010 Elsevier Ltd. All rights reserved.
Synthesis of trifluoromethyl-substituted N-aryl-poly-1,2,3-triazole derivatives
作者:A. Sudheer Kumar、Nagarjuna Kommu、Vikas D. Ghule、Akhila K. Sahoo
DOI:10.1039/c3ta15184k
日期:——
spectroscopic methods; the solid state structures of some of the compounds are confirmed by X-ray diffraction techniques. The synthesized materials decompose in the range of 195–308 °C. Most of the –CF3 and –NO2 groups-bearing aryl triazoles exhibit good densities and acceptable detonation characteristics. Some of the fluorine containing polytriazole-bearing compounds showed positive heats of formation.
We herein report a highly efficient method for the arylation at the C-5 position of N-aryl 1,2,3-triazoles via a direct palladium catalyzed arylation reaction. The optimal reaction conditions required a combination of Pd(OAc)(2) and tris(o-tolyl)phosphine as catalyst, and Cs2CO3 as the base under inert atmosphere. A variety of C-5 substituted N-aryl 1,2,3-triazoles were prepared using these conditions with yields in the 70-88% range. Regioselective C-5 arylations were also performed on 1,4-disubstituted 1,2,3-triazoles. The regioselectivity in triazole substitution at the C-5 position was confirmed by single crystal XRD. In addition, computational investigations of key steps of the catalytic cycle using the density functional theory have provided a rationalization to the selective C-5 arylation of N-aryl 1,2,3-triazoles.
US4610717A
申请人:——
公开号:US4610717A
公开(公告)日:1986-09-09
Facile and quick synthesis of 1-monosubstituted aryl 1,2,3-triazoles: a copper-free [3+2] cycloaddition
作者:Yubo Jiang、Chunxiang Kuang、Qing Yang
DOI:10.1016/j.tet.2010.11.051
日期:2011.1
An efficient copper-free synthesis of 1-monosubstituted aryl 1,2,3-triazoles from sodium acetylide and aryl azides was developed, which was found suitable for various aryl azides and completed within 15 min at room temperature with moderate to excellent yields. (C) 2010 Elsevier Ltd. All rights reserved.
Design and applications of new phosphine-free tetradentate Pd-catalyst: Regioselective C–H activation on 1-substituted 1,2,3-triazoles and indoles(NH-Free)
作者:Sarma V. Markandeya、Ch. Renuka、Parvathi K. Lakshmi、A. Rajesh、Chidara Sridhar、Korupolu Raghu Babu
DOI:10.1080/00397911.2017.1381260
日期:2018.1.17
ABSTRACT This article describes the synthesis of a new phosphine free tetradentate Pd catalyst using dl-2,3-diaminopropionic acid. The complex was characterized by Mass, IR, and 1H NMR. The catalyst is air stable at room temperature and non-hygroscopic. Application of this new catalyst to regioselective C–H activation on 1-substituted 1,2,3-triazole and indoles with aryl iodides to get corresponding