Catalytic asymmetric synthesis of β-triazolyl amino alcohols by asymmetric transfer hydrogenation of α-triazolyl amino alkanones
摘要:
The synthesis of optically active beta-triazolyl amino alcohols was carried out via ruthenium catalyzed asymmetric transfer hydrogenation of alpha-triazolyl amino alkanones. This reaction proceeds under mild reaction conditions with up to 99% yield and 99.9% enantiomeric excess (ee). This protocol was applied to the synthesis of an enantiopure antitubercular agent and its arylated product with retention in enantiomeric purity. The absolute configuration at the stereogenic center of the chiral product as found to be (S). (C) 2017 Elsevier Ltd. All rights reserved.
A series of N‐heterocyclic copper carbene complexes bearing sulfoxide and sulfone moieties have been prepared. In case of new copper compounds with sulfone ligand, the solid‐state structures were determined using X‐Ray crystallography. Obtained complexes were investigated as catalysts in such transformations as: 1,3‐dipolar cycloaddition of alkynes and azides (CuAAC), A3 coupling reaction and β‐hydroboration
The synthesis of a family of N-heterocyclic copper carbene complexes bearing sulfur moiety using different copper(I) halides and convenient route procedures have been reported. The solid state structures of presented copper compounds were elucidated using X-Ray crystallography. Next, obtained complexes were examined in various catalytic transformations including 1,3-dipolar cycloaddition of alkynes
已经报道了使用不同的铜 (I) 卤化物和方便的路线程序合成一系列带有硫部分的 N-杂环铜卡宾配合物。使用 X 射线晶体学阐明了所呈现的铜化合物的固态结构。接下来,在各种催化转化中检查获得的配合物,包括炔烃和叠氮化物的 1,3-偶极环加成、A3 偶联反应和 β-硼氢化反应。
A facile and regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles using click chemistry
作者:Dalip Kumar、V. Buchi Reddy、Rajender S. Varma
DOI:10.1016/j.tetlet.2009.02.107
日期:2009.5
The reaction of α-tosyloxy ketones, sodium azide, and terminal alkynes in presence of copper(I) in aqueous polyethylene glycol afforded regioselectively 1,4-disubstituted 1,2,3-triazoles in good yield at ambient temperature. The one-pot exclusive formation of 1,4-disubstituted 1,2,3-triazoles involves in situ formation of α-azido ketones, followed by cycloaddition reaction with terminal alkyne. The