A new type of phosphorus‐doped porous organic polymer (POP) has been readily synthesized through a Heck reaction, which could be used not only as a support but also a ligand for palladium nanoparticles. The dual‐functional material supported palladium nanocatalyst was used for the efficient and chemoselective hydrogenation of varieties of nitroarenes and α,β‐unsaturated compounds, as well as for the synthesis of indoles from 2‐nitrophenylacetonitrile under 1 atm hydrogen in green solvents at room temperature. No obvious aggregation and loss of catalytic activity of the new nanocatalyst were observed after 10 runs in the reaction.magnified image
A porous organic polymer (POL-Xantphos) was synthesized and employed as a heterogeneous ligand for selective hydrosilylation of alkynes. It exhibits high selectivity and catalytic efficiency toward a broad range of alkynes. Owing to the confinement effect of the micropore structure, POL-Xantphos was far superior to the monomeric Xantphos ligands in controlling the selectivity. By performing hydrosilylation in a flow reactor system, separation and regeneration of the Ni/POL-Xantphos catalyst are easily achieved without any loss in selectivity or activity.
A highly efficient regioselective method for allene hydroboration has been developed, with the regioselectivity governed primarily by the appropriate choice of the metal. Boryl addition to internal or external carbon-carbon...
A porous organic polymer (POL-xantphos) was synthesized and employed as a heterogeneous ligand for the nickel catalyzed highly regio- and stereo-selective 1,3-diyne hydrosilylation. A broad scope of unsymmetrical and symmetrical...
Allylic sulfones are important building
blocks in organic synthesis
and pharmaceutical chemistry. Herein, we disclose a chemodivergent
protocol for Pd-catalyzed and ligand-controlled coupling of allenes
with sulfinic acids, providing straightforward and atom-economical
access to branched allylic sulfones and linear allylic sulfones bearing
a conjugated (Z,E)-1,3-diene scaffold in good yields
with high selectivities. This strategy features mild conditions, an
unprecedented substrate scope, and functional group compatibility.
The development of radical hydroboration of alkyne remains an important challenge. Here we report transition metal-free trans-hydroboration of alkynes with NHC-boranes via the synergistic merger of 4CzIPN as photoredox organocatalyst...
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