Copper-Catalyzed Sequential Azomethine Imine-Alkyne Cycloaddition and Umpolung Thiolation Reactions
Copper-catalyzed sequential 1,3-dipolar cycloadditions of azomethine imines and alkynes and electrophilic thiolations are described. The C?S, C?N, and C?C bonds were simultaneously formed in one pot, leading to N,N-bicyclic pyrazolidinones in good to exce
(Z)-1-alkylidene-and 1-arylmethylidene-5,5-dimethyl-3-oxopyrazolidin-1-ium- 2-ides and their cycloaddition to N-arylmaleimides
The reaction of (Z)-1-arylmethylidene-5,5-dimethyl-3-oxopyrazolidin-1-ium- 2-ides with para-substituted N-arylmaleimides at 110°C is cis-stereoselective [cis/trans-adduct ratio ≥(9-10) : 1]. Under analogous conditions, the conversion of (Z)-1-(2,6-dichlor
Visible-Light Driven Selective C-N Bond Scission in anti-Bimane-Like Derivatives
In the present study, we report the photochemical transformation of pyrazolo[1,2-a]pyrazolone substrates that reach an excited state upon irradiation with visible light to initiate the homolytic C-N bond cleavage process that yields the corresponding N1-s
Copper(II)-catalyzed exo and enantioselective cycloadditions of azomethine imines
(Chemical Equation Presented) A strategy for exo and enantioselective 1,3-dipolar cycloaddition of azomethine imines to 2-acryloyl-3-pyrazolidinone is described. The corresponding cycloadducts are isolated with high diastereoselectivities (up to > 96:4 ex
Sibi, Mukund P.,Rane, Digamber,Stanley, Levi M.,Soeta, Takahiro
supporting information; experimental part
p. 2971 - 2974
(2009/05/11)
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