Catalytically generated vinyl gold complexes from tert‐butyl allenoates were found to undergo an efficient cross‐coupling with arenediazonium salts. The gold(I)‐gold(III) redox cycle can be accessed under two different conditions, i.e., visible‐light photoredox as well as a thermally induced radical chain pathway. The current C(sp2)C(sp2) cross‐coupling protocol that is catalytic in gold, would make available desirable structural diversity to the traditional cross‐coupling chemistry.magnified image
In this work, we demonstrate an extremely simple but highly effective strategy for the synthesis of various functional metal oxides (MOs) such as ZnO, In2O3, Bi2O3, and SnO2nanoparticles with various distinct shapes at room temperatureviaa solid-state reaction method.
A convenient visible-light
photoredox catalysis has been developed
for the synthesis of thioesters from two readily available starting
materials: acid chlorides and sodium sulfinates. The facile generation
of acyl radical species under the visible light photoredox conditions
allows the formation of thiyl radical species from sodium sulfinates
via multiple single electron transfer reactions, where the final acyl
radical-thiyl radical coupling has been accomplished. The direct radical–radical
coupling strategy offers a mild and controlled photochemical approach
to important synthetic building blocks such as thioesters.
The
generation of aminium radical cation species from N-nitrosoamines is disclosed for the first time through visible-light
excitation at 453 nm. The developed visible-light-promoted photoaddition
reaction of N-nitrosoamines to alkenes was combined
with the o-NQ-catalyzed aerobic oxidation protocol
of amines to telescope the direct handling of harmful N-nitroso compounds, where the desired α-amino oxime derivatives
were obtained in a one-pot tandem N-nitrosation and photoaddition
sequence.
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