2012
DOI: 10.1021/ja309325e
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Ligand-Enabled Methylene C(sp3)–H Bond Activation with a Pd(II) Catalyst

Abstract: Pd(II)-Insertion into β-methylene C(sp3)–H bonds was enabled by a mutually-repulsive and electron-rich quinoline ligand. Ligand tuning has led to the development of a method that allows for installation of an aryl group on a range of acyclic and cyclic amides containing β-methylene C(sp3)–H bonds.

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Cited by 244 publications
(94 citation statements)
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“…The Yu group employed a weakly coordinating N-arylamide group for the monoarylation of a cyclopropane 80 with p-iodotoluene in the presence of 2-isobutoxyquinoline (82) as the ligand (Scheme 22) [44]. The ligand had the property of being "mutually repulsive": it allowed for single coordination of Pd to its pyridine portion but also coordination of Pd to the arylamide group of 80.…”
Section: Intermolecular Direct Functionalization Of Cyclopropanesmentioning
confidence: 99%
“…The Yu group employed a weakly coordinating N-arylamide group for the monoarylation of a cyclopropane 80 with p-iodotoluene in the presence of 2-isobutoxyquinoline (82) as the ligand (Scheme 22) [44]. The ligand had the property of being "mutually repulsive": it allowed for single coordination of Pd to its pyridine portion but also coordination of Pd to the arylamide group of 80.…”
Section: Intermolecular Direct Functionalization Of Cyclopropanesmentioning
confidence: 99%
“…Dieses Ergebnis ist umso bemerkenswerter, wenn man die relativ schwierige Aktivierung der C(sp 3 )-H-Bindung einer Methylengruppe im Vergleich zu einer Methylgruppe bedenkt. [15] Die Reaktion konnte mit oder ohen Lçsungsmitteldurchgeführt werden und erforderte eine Kombination aus Pd(OAc) 2 Diesem anfänglichen Bericht von Daugulis folgten rasch weitere Verçffentlichungen. Corey et al nutzten die Verfahrensweise für die diastereoselektive C-H-Arylierung von ageschützten Aminosäuren.…”
Section: Arylierung Und Alkenylierung Von C-h-bindungenunclassified
“…The yield was improved when an alkoxyl group was introduced to the 2-position of quinoline ( L4 – L6 ). [9] 2,4-dialkoxyl substituted quinolines ( L7 – L9 ) further increases the yield, indicating that electron-donating substituent will enhance the efficiency of the ligand. Therefore, we started to test tricyclic quinoline ( L10 – L14 ) with 2-alkoxy moiety constrained in the ring where one of the oxygen lone pairs is parallel to the π-system of the quinoline ring.…”
mentioning
confidence: 99%