Ruthenium(<scp>ii</scp>) oxidase catalysis for C–H alkenylations in biomass-derived γ-valerolactone
作者:Alexander Bechtoldt、Marcel E. Baumert、Luigi Vaccaro、Lutz Ackermann
DOI:10.1039/c7gc03353b
日期:——
Ruthenium(II) biscarboxylate oxidasecatalysis is a powerful tool for the assembly of functionalized arenes with oxygen as a green oxidant, but this strategy was thus far limited to its use in traditional organic solvents. Herein, we report on a green procedure for the ruthenium(II) biscarboxylate-catalysed C–H functionalisation in biomass-derived γ-valerolactone as the reaction medium. The oxidase
Direct access to isoindolines through tandem Rh(<scp>iii</scp>)-catalyzed alkenylation and cyclization of N-benzyltriflamides
作者:Neeraj Kumar Mishra、Jihye Park、Satyasheel Sharma、Sangil Han、Mirim Kim、Youngmi Shin、Jinbong Jang、Jong Hwan Kwak、Young Hoon Jung、In Su Kim
DOI:10.1039/c3cc49486a
日期:——
The rhodium-catalyzed oxidative alkenylation of N-benzyltriflamides with olefins followed by an intramolecular cyclization via C–H bond activation is described.
Ruthenium-Catalyzed Oxidative C–H Bond Alkenylations in Water: Expedient Synthesis of Annulated Lactones
作者:Lutz Ackermann、Jola Pospech
DOI:10.1021/ol201563r
日期:2011.8.19
Ruthenium-catalyzed cross-dehydrogenative C-H bond alkenylations occurred efficiently in environmentally benign water, which was exploited for an oxidative phthalide synthesis with ample scope. Mechanistic studies provided strong evidence for the oxidative alkenylation to proceed by an irreversible C-H bond metalation via acetate assistance.
Electrooxidative Rhodium-Catalyzed C−H/C−H Activation: Electricity as Oxidant for Cross-Dehydrogenative Alkenylation
Rhodium(III) catalysis has enabled a plethora of oxidative C−H functionalizations, which predominantly employ stoichiometric amounts of toxic and/or expensive metal oxidants. In contrast, we herein describe the first electrochemical rhodium‐catalyzedC−Hactivation that avoids hazardous chemical oxidants. Environmentally benign twofold C−H/C−H functionalizations were accomplished with weakly coordinating