An Organocatalytic Azide-Aldehyde [3+2] Cycloaddition: High-Yielding Regioselective Synthesis of 1,4-Disubstituted 1,2,3-Triazoles
作者:Dhevalapally B. Ramachary、Adluri B. Shashank、S. Karthik
DOI:10.1002/anie.201406721
日期:2014.9.22
An organocatalyticazide–aldehyde [3+2] cycloaddition (organo‐click) reaction of a variety of enolizable aldehydes is reported. The organo‐click reaction is characterized by a high rate and regioselectivity, mild reaction conditions, easily available substrates with simple operation, and excellent yields with a broad spectrum of substrates. It constitutes an alternative to the previously known CuAAC
A Facile One-Pot Metal-Free Synthesis of 1,4-Disubstituted 1,2,3-Triazoles
作者:Qianfa Jia、Gongming Yang、Lei Chen、Zhiyun Du、Jia Wei、Yanqiong Zhong、Jian Wang
DOI:10.1002/ejoc.201500360
日期:2015.6
A 1,3-dipolar cycloaddition reaction of commercially available aldehydes with azides and secondary amines through a one-pot strategy has been developed. This method furnishes 1,4-disubstituted1,2,3-triazoles in good to excellent yields and high levels of regioselectivity.
Copper(II)-dipicolinate-mediated clickable azide–alkyne cycloaddition in water as solvent
作者:Lahoucine Bahsis、Hicham Ben El Ayouchia、Hafid Anane、Smail Triki、Miguel Julve、Salah-Eddine Stiriba
DOI:10.1080/00958972.2018.1435870
日期:2018.3.4
complex is an efficient precatalyst that mediates azide–alkynecycloaddition reactions in water at room temperature either in the absence or presence of a reducing agent. Compound 1-mediated azide–alkynecycloaddition affords alkyl/aryl substituted 1,2,3-triazole heterocycles in a regioselective manner and excellent yields under very mild reaction conditions matching the criteria of greener protocols.
Microwave-Assisted Azide-Alkyne Cycloaddition in Water Using a Heterogeneous Cu-Catalyst
作者:Katharina Jacob、Achim Stolle
DOI:10.1080/00397911.2013.850511
日期:2014.5.3
Several triazoles have been synthesized. They were obtained by a Cu-catalyzed cycloaddition of azides and alkynes. The reaction takes place in aqueous media under microwave irradiation using a copper catalyst based on porous glass. The products have been characterized by infrared, gas chromatography-mass spectrometry, H-1 NMR, and C-13 NMR in addition to melting=point determination. Furthermore the in situ building of some azides and alkynes and the influence of the used metal species was investigated.