2011
DOI: 10.1021/ja206339s
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Storable Arylpalladium(II) Reagents for Alkene Labeling in Aqueous Media

Abstract: We show that arylpalladium(II) reagents linked to biotin and indocyanine dye residues can be prepared by decarboxylative palladation of appropriately substituted electron-rich benzoic acid derivatives. When prepared under the conditions described, these organometallic intermediates are tolerant of air and water, can be stored for several months in solution in dimethylsulfoxide, and permit biotin- and indocyanine dye-labeling of functionally complex olefinic substrates in water by Heck-type coupling reactions.

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Cited by 43 publications
(46 citation statements)
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“…In conclusion, we have developed Pd-mediated siteselective S-arylation that exploits endogenous metal-binding motifs. In contrast to previous Pd-mediated bionconjugation reactions, 34,42,43 the isolation of a preformed Pd-aryl complex was not necessary and renders this protocol easy to implement. It also enables regioselective differentiation to enhance product homogeneity in proteins bearing multiple Cys.…”
Section: Scheme 1 Established Strategies Compared To Metalsite Guidementioning
confidence: 99%
“…In conclusion, we have developed Pd-mediated siteselective S-arylation that exploits endogenous metal-binding motifs. In contrast to previous Pd-mediated bionconjugation reactions, 34,42,43 the isolation of a preformed Pd-aryl complex was not necessary and renders this protocol easy to implement. It also enables regioselective differentiation to enhance product homogeneity in proteins bearing multiple Cys.…”
Section: Scheme 1 Established Strategies Compared To Metalsite Guidementioning
confidence: 99%
“…This compound was obtained in 82% yield; mp 217-221 °C; (reported: mp 165-166 °C) (Simmons et al, 2011). …”
Section: Expermental Methodsmentioning
confidence: 96%
“…Angeregt durch frühere Arbeiten zur Arylierung von Seleniden in kleinen Molekülen [214,215] entwickelten sie eine Methode zur Arylierung von oxidiertem Sec, wobei Boronsäurereagentien in einem Kupfer-vermittelten Prozess umgesetzt wurden. Zunächst wird einer der beiden Kupplungspartner an der gewünschte Positionen im Protein angebracht, und zwar in Form einer nichtnatürlichen Aminosäure durch chemische [216][217][218][219] oder enzymatische [220] Markierung,F estphasensynthese (solid-phase peptide synthesis,S PPS) [221,222] oder aber durch Erweiterung des genetischen Codes [223][224][225][226][227][228] (Ab-bildung 42). Aufd iese Weise konnte das in einem komplexen Peptid enthaltene Sec mit einer großen Vielfalt von Boronsäuren aryliert werden.…”
Section: Arylierung Oxidierter Selenocystein-elektrophileunclassified