Reactivity of the maleimidato ligand in CpFe(CO)2(η1-N-maleimidato) in Diels-Alder reaction with 1,3-diphenylisobenzofuran. The crystal structure of [CpFe(CO)2(η1-N-1,4-diphenyl-1,4-epoxy-1,4-dihydronaphthalene-2,3-dicarboxyimidato)]
1,3-diphenylisobenzofuran to afford the Diels-Alder adduct [CpFe(CO)2(η1-N-1,4-diphenyl-1,4-epoxy-1,4-dihydronaphthalene-2,3-dicarboxyimidato)] 2 in nearly quantitative yield. The competitive experiment showed that this reaction is around three times slower than the reaction of the parent maleimide with 1,3-diphenylisobenzofuran. The X-raycrystalstructure of 2 has been determined. It revealed a scrolled
Addition of imidazoles and aminoacids to the ethylenic bond in (η5-C5H5)Fe(CO)2(η1-N-maleimidato)
作者:Bogna Rudolf、Janusz Zakrzewski
DOI:10.1016/0022-328x(96)06328-0
日期:1996.9
(η5-C5H5)Fe(CO)2(η1-N-maleimidato)1 reacts in water solution at pH = 7 with imidazole, histidine methyl ester and carnosine to give the products of the addition of the heterocyclic moiety to the ethylenic bond of the maleimidato ligand. Addition of the primary amino group of glycine and β-alanine to 1 takes place at pH = 10 and 60°C. These results are relevant for labelling of peptides and proteins
Inverse electron‐demand Diels‐Alder (iEDDA) bioorthogonal conjugation of half‐sandwich transition metallocarbonyl entities to a model protein
作者:Daria Jamroz、Nathalie Fischer‐Durand、Marcin Palusiak、Sławomir Wojtulewski、Szymon Jarzyński、Marlena Stępniewska、Michèle Salmain、Bogna Rudolf
DOI:10.1002/aoc.5507
日期:2020.4
group were synthesized by [4 + 2] cycloaddition between the organometallic maleimide dienophiles and cyclopentadiene or furan, respectively. The oxanorbornene adduct was obtained as a mixture of endo and exo isomers as confirmed by X‐ray diffraction and NMR spectroscopy. The (oxa)norbornene groups further provided convenient chemical reporters to carry out inverseelectrondemand Diels‐Alder (iEDDA) reactions
develop alternative approaches to introduce metallocarbonyl infrared labels onto proteins on the basis of the [3 + 2] dipolar azide‐alkyne cycloaddition (AAC). To this end, two cyclopentadienyliron dicarbonyl (Fp) complexes carrying a terminal or a strained alkyne handle were synthesized. Their reactivity was examined towards a model protein and poly (amidoamine) (PAMAM) dendrimer, both carrying azido
Metallo-carbonyl complexes based on the CpFe(CO)2(η1-N-imidato) system as protein labelling reagents: reactivity and selectivity studies using bovine serum albumin as a model protein
cyclopentadienyl iron dicarbonyl fragments into proteins have been developed. Synthesis of a maleimide and of an N-succiminidyl ester and their reactivity with a model protein, namely bovine serum albumin (BSA), are described here. Results show that BSA can be labelled by both reagents at neutral to basic pH, and, as for the maleimide, side-chain selectivity can be tuned as a function of experimental coupling