A versatile and site-selective rhodium(III)-catalyzed aerobic oxidativealkenylation of arylacetamides including primary, secondary, and tertiary amides having a weak O-coordinating acetamide directing group with alkenes is described. In the reaction, air was utilized as a sole oxidant. The reaction was compatible with activated alkenes and maleimides.
The C–H alkylation of arylacetamides with activated alkenes such as substituted acrylates and vinylsulphone in the presence of a ruthenium catalyst and organic acid via the weak O-coordination under the redox free version is described. The present protocol was effective with different substituted arylacetamides including secondary and tertiary amides. The reaction mechanism including the ortho C–H
Divergent Synthesis of α-Fluorinated Carbonyl and Carboxyl Derivatives by Double Electrophilic Activation of Amides
作者:Amaury Dubart、Gwilherm Evano
DOI:10.1021/acs.orglett.1c03450
日期:2021.11.19
entry to α-fluorinated carbonyl and carboxyl derivatives is reported. Upon activation of amides with triflic anhydride and a 2-halo-pyridine and subsequent trapping of the resulting keteniminium ions with nucleophiles followed by a second electrophilic activation with NFSI and final hydrolysis, a range of amides can be transformed to α-fluorinated ketones, esters, and amides under mild conditions. Moreover
Photoenzymatic Reductions Enabled by Direct Excitation of Flavin-Dependent “Ene”-Reductases
作者:Braddock A. Sandoval、Phillip D. Clayman、Daniel G. Oblinsky、Seokjoon Oh、Yuji Nakano、Matthew Bird、Gregory D. Scholes、Todd K. Hyster
DOI:10.1021/jacs.0c11494
日期:2021.2.3
Non-natural photoenzymatic reactions reported to date have depended on the excitation of electrondonor-acceptorcomplexes formed between substrates and cofactors within protein active sites to facilitate electron transfer. While this mechanism has unlocked new reactivity, it limits the types of substrates that can be involved in this area of catalysis. Here we demonstrate that direct excitation of
Correction to “Photoenzymatic Reductions Enabled by Direct Excitation of Flavin-Dependent ‘Ene’-Reductases”
作者:Braddock A. Sandoval、Phillip D. Clayman、Daniel G. Oblinsky、Seokjoon Oh、Yuji Nakano、Matthew Bird、Gregory D. Scholes、Todd K. Hyster
DOI:10.1021/jacs.1c01618
日期:2021.3.10
the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences of the U.S. Department of Energy (DOE) through grant DE-SC0019370. Use of the Laser Electron Accelerator Facility (LEAF) of the BNL Accelerator Center for Energy Research (ACER) was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences