An Enolate-Mediated Organocatalytic Azide-Ketone [3+2]-Cycloaddition Reaction: Regioselective High-Yielding Synthesis of Fully Decorated 1,2,3-Triazoles
作者:Adluri B. Shashank、S. Karthik、R. Madhavachary、Dhevalapally B. Ramachary
DOI:10.1002/chem.201405501
日期:2014.12.15
An enolate‐mediated organocatalytic azide–ketone [3+2]‐cycloaddition (OrgAKC) reaction of a variety of enolizable arylacetones and deoxybenzoins with aryl azides was developed for the synthesis of fully decorated 1,4‐diaryl‐5‐methyl(alkyl)‐1,2,3‐triazoles in excellent yields with high regioselectivity at 25 °C for 0.5–6 h. This reaction has an excellent outcome with reference to reaction rate, yield
An enolate-mediated regioselective synthesis of 1,2,3-triazoles via azide-aldehydes or ketones [3+2]-cycloaddition reactions in aqueous phase
作者:Anupam Tripathi、Chandrashekhar V. Rode、Jordi Llop、Subhash P. Chavan、Sameer M. Joshi
DOI:10.1016/j.tetlet.2020.151662
日期:2020.3
arylazides into the corresponding trizoles via phase transfer catalyst-assisted [3+2] cycloaddition reaction under basic conditions in aqueous medium is reported. This synthetic methodology, which offers high yields and excellent regioselectivity for varieties of triazoles at 100 °C for 24 hr- 48 hr and this ‘greener’ synthesis constitutes an alternative to the previously reported well established click
Copper(I)-Catalyzed Direct Arylation of 1,4-Disubstituted 1,2,3-Triazoles with Aryl Iodides
作者:Shin-ichi Fukuzawa、Eiji Shimizu、Kenichi Ogata
DOI:10.3987/com-08-11546
日期:——
Treatment of 1,4-disubstituted 1,2,3-triazoles with aryl iodides in the presence of a catalytic amount of copper chloride and lithium tert-butoxide (stoichiometric) in DMF at 140 degrees C leads to arylation at the 5-position. Various combinations of substituted aryl iodides and 1,4-disubstituted 1,2,3-triazoles bearing functional groups were found to be compatible.