Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 1245-13-2, molcular formula is C20H12N2O4, introducing its new discovery. Product Details of 1245-13-2
Peptide Functionalization Through the Generation of Selenocysteine Electrophile
Herein we report the first example of a strategy for peptide functionalization through the generation of selenocysteine electrophile in 5- and 6-endo-dig cyclization reactions. This simple approach allows bio-conjugation of selenocystine-based peptides. The developed protocol is based on copper(II) bromide mediated reactions of selenocystine with either 2-propargyl N-heterocycles through 5-endo-dig closure or with 2-ethynylbiaryls through 6-endo-dig closure. It allows construction of indolizinium moiety on selenocysteine residue as well as formation of polyaromatic fragment bonded to selenium in a simple one-pot process under mild reaction conditions.
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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI