Synthesis of 3-alkyl-6-methyl-1,2,4,5-tetrazines <i>via</i> a Sonogashira-type cross-coupling reaction
作者:Enric Ros、Amparo Prades、Dominique Forson、Jacqueline Smyth、Xavier Verdaguer、Lluís Ribas de Pouplana、Antoni Riera
DOI:10.1039/d0cc03482g
日期:——
alkynes. The preparation of the starting reagents has also been optimized. The alkynyl products have been used as intermediates for the synthesis of dialkyl-tetrazines through a sequence of hydrogenation and re-oxidation with unprecedented yields. The synthetic applicability of this new approach is showcased through the preparation of several unnatural amino acids bearing alkynyl- and alkyl-1,2,4,5-tetrazine
inverse electron demand Diels–Alder reaction (DAinv) and tetrazinesubstitutedfluorophores can exhibit fluorogenic properties. Herein, we report the synthesis of a palette of novel fluorogenic tetrazine dyes derived from widely-used fluorophores that cover the entire emission range from green to far-red. We demonstrate the power of the new fluorogenic probes in fixed and live cell labeling experiments
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).
aggregation-induced emission (AIE) characters and multicolor emissions after bioorthogonal reaction with strained dienophiles. Manipulating the π-bridge in the fluorophore skeleton allows fine-tuning of the emission wavelength and influences the AIE-active properties. With these probes, we succeeded in no-wash fluorogenic protein labeling and mitochondria-selective bioorthogonal imaging in livecells.
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