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Employing an optimized Pd-catalyzed cross-coupling reaction promoted by CuI, novel N-ferrocenylpyridazinones along with N-phenyl- and N-(2-pyridyl) analogues were synthesized from readily available heterocyclic precursors, iodoferrocene, iodobenzene and 2-bromopyridine. With exception of the ferrocenylation of 6-ferrocenylpyridazin-3(2H)-one yielding both N- and O-substituted products, the studied...
Fluorescent tagging of Cys-containing peptides is presented herein. The procedure follows a two-step sequential reaction scheme using thiol specific bifunctional chemical reporters and fluorogenic labels. Vinyl-sulfone bearing chemical reporters have been synthesized and demonstrated to selectively modify cysteine under physiological conditions in the presence of other nucleophilic amino acids. Bifunctional...
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