Nucleophilic Attack on Nitrogen in Tetrazines by Silyl-Enol Ethers
作者:Simon D. Schnell、Mauro Schilling、Jan Sklyaruk、Anthony Linden、Sandra Luber、Karl Gademann
DOI:10.1021/acs.orglett.0c04113
日期:2021.4.2
The nucleophilic addition of silyl-enol ethers to nitrogen in 3-monosubstituted s-tetrazines mediated by BF3 is reported. The preference for this azaphilic addition over the usually observed inverse electron demand Diels–Alder reactions was evaluated theoretically and corroborated by experiments. The substrate dependency of this unusual reaction was rationalized by determination of the activation barriers
Cross-Coupling Reactions of Monosubstituted Tetrazines
作者:Lukas V. Hoff、Simon D. Schnell、Andrea Tomio、Anthony Linden、Karl Gademann
DOI:10.1021/acs.orglett.1c01813
日期:2021.8.6
A Ag-mediated Pd-catalyzed cross-coupling method for 3-bromo-1,2,4,5-tetrazine with boronic acids is presented. Electronic modification of the 1,1′-bis(diphenylphosphine)ferrocene (dppf) ligand was found to be crucial for good turnover. Using this fast method, a variety of alkyl-, heteroatom-, and halide-substituted aryl- and heteroaryl-tetrazines were prepared (29 examples, up to 87% yield).
Synthesis and Application of 3-Bromo-1,2,4,5-Tetrazine for Protein Labeling to Trigger Click-to-Release Biorthogonal Reactions
作者:Enric Ros、Marina Bellido、Xavier Verdaguer、Lluís Ribas de Pouplana、Antoni Riera
DOI:10.1021/acs.bioconjchem.0c00052
日期:2020.3.18
dienophiles to trigger fast click-to-release (CtR) biorthogonal reactions. The characterization of the CtR reaction in physiological conditions and a therapeutically relevant example with the monoclonal antibody Trastuzumab to showcase its application is presented. Finally, 3-bromo-1,2,4,5-tetrazine has been used to achieve site-selective protein labeling through the genetic incorporation of the first unnatural
3-Bromotetrazine: labelling of macromolecules <i>via</i> monosubstituted bifunctional <i>s</i>-tetrazines
作者:Simon D. Schnell、Lukas V. Hoff、Advaita Panchagnula、Maximilian H. H. Wurzenberger、Thomas M. Klapötke、Simon Sieber、Anthony Linden、Karl Gademann
DOI:10.1039/c9sc06169j
日期:——
3-Bromotetrazine selectively labels small and macromolecules up to proteins and can then be used as a fluorophore or as a bio-orthogonal handle for downstream functionalisation.
Amino acids with fluorescent tetrazine ethers as bioorthogonal handles for peptide modification
作者:Enric Ros、Marina Bellido、Joan A. Matarin、Albert Gallen、Manuel Martínez、Laura Rodríguez、Xavier Verdaguer、Lluís Ribas de Pouplana、Antoni Riera
DOI:10.1039/d2ra02531k
日期:——
fluorescence turned off through a bioorthogonal iEDDA cycloaddition with a strained alkene, showing for the first time the detection and reactivity of intrinsically fluorescent tetrazines in a biologically relevant context. The synthesis and characterization of fluorescent tetrazine ethers with bioorthogonal applicability pave the way for the generation of useful compounds for both detection and bioconjugation