作者:James T. Fletcher、Joseph A. Christensen、Eric M. Villa
DOI:10.1016/j.tetlet.2017.10.023
日期:2017.11
tandem method for preparing 4-formyl-1,2,3-triazoles via a two-step one-pot acetal cleavage/CuAAC reaction was developed. Using this method, 4-formyl-1,2,3-triazole analogs with both electron-withdrawing and electron-donating substituents were prepared in good yield and purity. Expansion of this method to a three-step tandem reaction that incorporates an additional step of azide substitution was also successful
IMIDAZO[1,5-a]PYRIDINIUM ION FLUOROPHORES, AND METHODS OF MAKING AND USING THE SAME
申请人:Corporation Indiana University Research and Technology
公开号:US20140248646A1
公开(公告)日:2014-09-04
A fluorophore and methods of detecting cations and hydrophobic environments using the fluorophore are disclosed. The fluorophore includes an imidazo[1,5-a]pyridinium ion core and has the formula
where R
1
, R
2
, R
3
and X
−
are as defined in the specification, and n is an integer from 1 to 4.
Palladium-catalyzed carbonylative synthesis of α,β-unsaturated amides from aryl azides and alkenylaluminum reagent
作者:Bo Chen、Xiao-Feng Wu
DOI:10.1016/j.jcat.2020.01.017
日期:2020.3
In this work, an interesting procedure for the synthesis of α,β-unsaturatedamides from aryl azides and alkenylaluminum reagent has been developed. With palladium as the catalyst and XPhos as the ligand under carbon monoxide pressure, the desired α,β-unsaturatedamides were isolated in good to excellent yields with good functional group tolerance. Remarkably, this procedure also represents an example
Fluorogenic compounds converted to fluorophores by photochemical or chemical means and their use in biological systems
申请人:Tweg Robert J.
公开号:US20100029952A1
公开(公告)日:2010-02-04
Fluorophores derived from photoactivatable azide-pi-acceptor fluorogens or from a thermal reaction of an azide-pi-acceptor fluorogen with an alkene or alkyne are disclosed. Fluorophores derived from a thermal reaction of an alkyne-pi-acceptor fluorogen with an azide are also disclosed. The fluorophores can readily be activated by light and can be used to label a biomolecule and imaged on a single-molecule level in living cells.