2024年9月5日 · The Ir-catalyzed C (sp2)−H bond activation assisted by a directing group occurs via trans-chelation to form cyclometalation, while the secondary C (sp3)−H one occurs via cis-chelation.

2019年10月18日 · A Cu (0)/Selectfluor system-catalyzed intramolecular C sp2 -H/C sp2 -H bond cross-dehydrogenative coupling of 2-aryloxybenzaldehydes is described. A variety of substituted xanthone derivatives are synthesized in moderate to excellent yields.

2015年10月21日 · High resolution mass spectra (HRMS) were obtained with an Agilent LC-MSD-Trap-XCT spectromer with micromass MS software using the ESI technique. IR spectra were recorded on Shimadazu IR-408 fourier transform infrared spectrophotometer using a thin film supported on KBr pellets.

2015年5月1日 · We report a modular approach to catalytic reductive Csp2-H and Csp3-H silylation of carboxylic acid derivatives encompassing esters, ketones, and aldehydes. Choice of either an Ir (I)/Rh (I) or Rh (I)/Rh (I) sequence leads to either exhaustive reductive ester or reductive ketone/aldehyde silylation, res …

2019年10月18日 · A Cu (0)/Selectfluor system-catalyzed intramolecular C sp2 -H/C sp2-H bond cross-dehydrogenative coupling of 2-aryloxybenzaldehydes is described. A variety of substituted xanthone derivatives are synthesized in moderate to excellent yields.

2018年10月24日 · An efficient general method using a clean and transition-metal-free photochemical strategy for the direct Csp 2 -H radical difluoromethylation of coumarins with HCF 2 SO 2 Na was developed. The visible-light-promoted strategy proceeds with 5 mol % Eosin Y under mild reaction conditions and showed excellent functional group compatibility.

2023年12月7日 · In this work, we describe the synthesis of sterically attenuated, NHC-based, and pincer-supported cobalt-alkyl and -aryl complexes and their activity for C (sp 2)–H activation resulting in the borylation of nonfluorinated arenes and heteroarenes and, ultimately, meta -selective C (sp 2)–H borylation of fluoroarenes and tri- and difluoromethoxyla...

2021年1月25日 · Herein, we developed the first visible-light-induced direct Csp 2 -H radical 2,2,2-trifluoroethylation of coumarins with commercially available and cheap reagent CF 3 CH 2 I at room temperature. This transformation proceeded smoothly under mild conditions and showed excellent functional group compatibility.

bDepartment of Chemistry & Pharmacy, Inorganic Chemistry, Friedrich-Alexander-Universität Erlangen -

2016年8月5日 · An efficient copper-catalyzed selective cross coupling of imidazo [1,2-a]pyridines with methyl hetarenes has been reported. This transformation opened a new route to synthesize the C-3 carbonyl imidazo [1,2-a]pyridine derivative, which is a common structural motif in natural products and pharmaceutica …