MnCl<sub>2</sub>
-Catalyzed C−H Alkylations with Alkyl Halides
作者:Weiping Liu、Gianpiero Cera、João C. A. Oliveira、Zhigao Shen、Lutz Ackermann
DOI:10.1002/chem.201703191
日期:2017.8.25
C−H alkylations with challenging β-hydrogen-containing alkylhalides were accomplished with sustainable MnCl2 as the catalyst under phosphine-ligand-free conditions. The proximity-induced benzamide C−H activation occurred with ample substrate scope through rate-determining C−H metalation, also setting the stage for manganese-catalyzed oxidative C−H methylations.
Iron-Catalyzed C(sp<sup>2</sup>)H and C(sp<sup>3</sup>)H Arylation by Triazole Assistance
作者:Qing Gu、Hamad H. Al Mamari、Karolina Graczyk、Emelyne Diers、Lutz Ackermann
DOI:10.1002/anie.201311024
日期:2014.4.7
Modular 1,2,3‐triazoles enabled iron‐catalyzed CHarylations with broad scope. The novel triazole‐based bidentate auxiliary is easily accessible in a highly modular fashion and allowed for user‐friendly iron‐catalyzed C(sp2)H functionalizations of arenes and alkenes with excellent chemo‐ and diastereoselectivities. The versatile iron catalyst also proved applicable for challenging C(sp3)H functionalizations
Iron-Catalyzed C(sp<sup>2</sup>)H and C(sp<sup>3</sup>)H Methylations of Amides and Anilides
作者:Karolina Graczyk、Tobias Haven、Lutz Ackermann
DOI:10.1002/chem.201501134
日期:2015.6.8
bioactivities and physical properties of pharmacologically active drugs. Direct introduction of the methyl group by CH activation was accomplished with a versatile iron catalyst, which enabled the CH methylation of (hetero)benzamides, anilides, alkenes, and even alkanes by triazoleassistance in a chemo‐, site‐ and diastereo‐selective fashion.
Late-stage C(sp<sup>2</sup>)–H and C(sp<sup>3</sup>)–H glycosylation of <i>C</i>-aryl/alkyl glycopeptides: mechanistic insights and fluorescence labeling
C(sp3)–H and C(sp2)–H glycosylations of structurally complex amino acids and peptides were accomplished through the assistance of triazole peptide-isosteres. The palladium-catalyzed peptide–saccharide conjugation provided modular access to structurally complex C-alkyl glycoamino acids, glycopeptides and C-aryl glycosides, while enabling the assembly of fluorescent-labeled glycoamino acids. The C–H