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Synthesis of Spirobidihydropyrazole through Double 1,3-Dipolar Cycloaddition of Nitrilimines with Allenoates.
The double 1,3-dipolar cycloaddition of allenoates with nitrilimines has been achieved under mild reaction conditions, affording a variety of spirobidihydropyrazoles in moderate to excellent yields
Phosphine-Catalyzed [3+2] and [4+3]Annulation Reactions of C,N-Cyclic Azomethine Imines with Allenoates.
Phosphine-catalyzed [3+2] and [4+3]annulation reactions of C,N-cyclic azomethine imines with allenoates have been developed to give a variety of pharmaceutically attractive tetrahydroisoquinoline
Asymmetric Construction of Highly Functionalized Spirobarbiturate-Cyclopentenes through Chiral Phosphine-Catalyzed [3+2] Annulation of Morita–Baylis–Hillman Carbonates with Barbiturate-Derived Alkenes
A multifunctional chiral phosphine-catalyzed enantioselective [3+2] annulation of Morita–Baylis–Hillman carbonates with barbiturate-derived alkenes has been achieved under mild conditions, providing
Phosphine‐Catalyzed [4 + 2] Cycloaddition of Sulfamate‐Derived Cyclic Imines with Allenoates: Synthesis of Sulfamate‐Fused Tetrahydropyridines.
A [4 + 2] cycloaddition of sulfamate derived cyclic imines with a series of allenoates is developed using diphenyl(propyl)phosphane as the catalyst.
Enantioselective Synthesis of Spirobarbiturate-Cyclohexenes through Phosphine-Catalyzed Asymmetric [4 + 2] Annulation of Barbiturate-Derived Alkenes with Allenoates.
An enantioselective synthesis of pharmaceutically important spirobarbiturates has been achieved via spirocyclic chiral phosphine-catalyzed asymmetric [4 + 2] annulation of barbiturate-derived alkenes
Phosphine-catalyzed highly enantioselective [3 + 3] cycloaddition of Morita-Baylis-Hillman carbonates with C,N-cyclic azomethine imines.
TLDR
Using a spirocyclic chiral phosphine as the catalyst, a novel class of pharmaceutically interesting 4,6,7,11b-tetrahydro-1H-pyridazino[6,1-a]iso-quinoline derivatives were obtained in high yields with good to excellent diastereoselectivities and extremely excellent enantioselectivity.
Metal-catalyzed [6 + 3] cycloaddition of tropone with azomethine ylides: a practical access to piperidine-fused bicyclic heterocycles.
TLDR
The first metal-catalyzed [6 + 3] cycloaddition of tropone with azomethine ylides has been developed, affording piperidine-fused bicyclic heterocycles in moderate to high yields with good to excellent diastereo- and enantioselectivies.
Enantioselective copper-catalyzed [3+3] cycloaddition of azomethine ylides with azomethine imines.
TLDR
Enantioselective copper-catalyzed [3+3] cycloaddition of azomethine ylides with azomet H2O imines shows good chiral recognition ability and good racemates for high-performance liquid chromatography.
Nickel(II)-Catalyzed [8 + 3]-Cycloaddition of 2-Aryl- N-tosylaziridines with Tropone.
The Ni-catalyzed [8 + 3]-cycloaddition of tropone with 2-aryl- N-tosylaziridines proceeded smoothly under mild reaction conditions, affording various 4-tosyl-2,3,4,4a-tetrahydrocyclohepta[
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