4 research outputs found
Pd-Catalyzed Highly Regio- and Stereoselective Formation of C–C Double Bonds: An Efficient Method for the Synthesis of Benzofuran‑, Dihydrobenzofuran‑, and Indoline-Containing Alkenes
A highly regio- and
stereoselective C–C double bond formation
reaction via Pd-catalyzed Heck-type cascade process with <i>N</i>-tosylhydrazones has been developed. Various <i>N</i>-tosylhydrazones
derived from both ketones and aldehydes are found to be efficient
substrates to provide di- and trisubstituted olefins with high regio-
and stereoselectivity. Furthermore, this reaction has a good functional
group tolerance and different benzofuran-, dihydrobenzofuran-, and
indoline-containing alkene products were obtained with high selectivity
Copper-Catalyzed Oxysulfenylation of Enolates with Sodium Sulfinates: A Strategy To Construct Sulfenylated Cyclic Ethers
A new
copper-catalyzed oxysulfenylation reaction of enolates with
sodium sulfinates has been disclosed. A series of sulfenylated heterocycles
including four- and seven-membered cyclic ether were obtained in mild
to good yields. This reaction is proposed to go through a radical
process, and the sulfur radical (RS<sup>•</sup>) may be a reactive
species
Synthesis of Polysubstituted 3‑Amino Pyrroles via Palladium-Catalyzed Multicomponent Reaction
A novel approach for the synthesis
of polysubstituted 3-amino pyrroles
via palladium-catalyzed three-component tandem reaction was developed.
The procedure constructs various polysubstituted 3-amino pyrroles
with moderate to excellent yields under mild reaction conditions with
assembly efficiency, readily available starting materials, and good
functional group tolerance. Furthermore, this process was successfully
applied to the synthesis of different 3-phenyl-1,4-dihydropyrroloÂ[3,2-<i>b</i>]Âindole derivatives via an intramolecular Buchwald–Hartwig
cross-coupling reaction in two steps
Palladium-Catalyzed Multicomponent Reaction (MCR) of Propargylic Carbonates with Isocyanides
A palladium-catalyzed multicomponent
reaction (MCR) of propargylic
carbonates with isocyanides is reported. Remarkably, the orderly insertion
of isocyanides affords two types of valuable <i>N</i>-heterocyclic
products (<i>Z</i>)-6-imino-4,6-dihydro-1<i>H</i>-furoÂ[3,4-<i>b</i>]Âpyrrol-2-amines and (<i>E</i>)-5-iminoÂpyrrolones in high yields. Systematic analysis
of the reaction conditions indicates that the selectivity of these
N-heterocyclic products can be controlled by ligands and temperature