Kinetic study on the aromatic nucleophilic substitution reaction of 3,6-dichloro-1,2,4,5-tetrazine by biothiols
作者:Daniela Andrade-Acuña、José G. Santos、William Tiznado、Álvaro Cañete、Margarita E. Aliaga
DOI:10.1002/poc.3316
日期:2014.8
cysteinyl–glycine, two consecutive reactions are observed. The first one is the nucleophilicaromaticsubstitution of the chlorine by the sulfhydryl group of these biothiols (RSH) and the second one is the intramolecular and intermolecular nucleophilicaromaticsubstitutions of their alkylthio with the amine group of RSH to give the di‐substituted compound. Therefore, in these cases, two pseudo first‐order rate constants
Tetrazine Phototriggers: Probes for Peptide Dynamics
作者:Matthew J. Tucker、Joel R. Courter、Jianxin Chen、Onur Atasoylu、Amos B. Smith、Robin M. Hochstrasser
DOI:10.1002/anie.201000500
日期:2010.5.10
Surrender your secrets, peptides! Of several 3,6‐disubstituted tetrazines examined as phototriggers for the investigation of peptidedynamics, the most useful candidates were disulfenyl tetrazines. The thiocyanate fragments resulting from photolysis (see scheme) were detected by ultrafast infrared spectroscopy. Chromophore insertion into oxytocin and photofragmentation to trigger peptide relaxation were both