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.
Synthesis of N -unsubstituted 1,2,3-triazoles via aerobic oxidative N -dealkylation using copper(II) acetate
作者:Hyojin Cha、Kyongkyu Lee、Dae Yoon Chi
DOI:10.1016/j.tet.2017.03.068
日期:2017.5
copper-catalyzed aerobicoxidative CN bond cleavage reaction was developed for the synthesis of 4-substituted-NH-1,2,3-triazoles. Diverse β-ketotriazoles derivatives, which are the starting materials for the aerobicoxidative CN bond cleavage reaction, were prepared from nine aryl and seven alkyl alkynes and α-azidoacetophenone by a copper(I)-catalyzed [3 + 2]cycloaddition reaction. The aerobicoxidation of α-(1