Cobalt-Based Layered Metal-Organic Framework as an Ultrahigh Capacity Supercapacitor Electrode Material.

Metal-organic frameworks (MOFs) have recently received increasing interest due to their potential application in the energy storage and conversion field. Herein, cobalt-based layered MOF ({[Co(Hmt)(tfbdc)(H2O)2]·(H2O)2}n, Co-LMOF; Hmt = hexamethylenetetramine; H2tfbdc = 2,3,5,6-tetrafluoroterephthalic acid) has been evaluated as an electrode material for supercapacitors. The Co-LMOF electrode exhibits a high specific capacitance and excellent cycling stability.

Facile synthesis of 3-aryloxindoles via brønsted acid catalyzed Friedel-Crafts alkylation of electron-rich arenes with 3-diazooxindoles.

A simple metal-free method for the synthesis of 3-aryloxindoles via Brønsted acid catalyzed aromatic C-H functionalization of electron-rich arenes with 3-diazooxindoles is developed. In the presence of a catalytic amount of TfOH, a series of 3-aryloxindoles are synthesized as single regioisomers in good to excellent yields. This transformation is proposed to proceed through acid-catalyzed protonation of 3-diazooxindoles into diazonium ions followed by Friedel-Crafts-type alkylation of arenes.

Iron porphyrin-catalyzed three-component reaction of ethyl diazoacetate with aliphatic amines and β,γ-unsaturated α-keto esters.

An iron porphyrin-catalyzed three-component reaction of ethyl diazoacetate with aliphatic amines and β,γ-unsaturated α-keto esters is reported. The use of iron porphyrin catalyst allows aliphatic amines to be used as the substrate without encountering catalyst poisoning issue and a series of β-hydroxy-α-amino esters are produced in high yields with excellent regioselectivities.

Highly enantioselective trapping of zwitterionic intermediates by imines.

Reactions with the unstable and highly reactive zwitterionic intermediates generated in processes catalysed by transition metals are providing new opportunities for molecular constructions. Insertion reactions involve the collapse of zwitterionic intermediates, but trapping them would allow structural elaborations that are not currently available. To synthesize complex molecules in this manner, reactive electrophiles can be used to trap the zwitterionic intermediates.

Copper(II)-catalyzed highly diastereoselective three-component reactions of aryl diazoacetates with alcohols and chalcones: an easy access to furan derivatives.

Copper(II) complexes are efficient catalysts in three-component reactions of aryl diazoacetates with alcohols and chalcones to give gamma-hydroxyketone derivatives in high yield with excellent diastereoselectivity. The resulting coupling adducts can be easily converted into furan-containing oligoaryls, tetrahydrofuran and 2,3-dihydrofuran derivatives.

One-pot three-component tandem reaction of diazo compounds with anilines and unsaturated ketoesters: a novel synthesis of 2,3-dihydropyrrole derivatives.

A facile synthesis of 2,3-dihydropyrrole derivatives has been achieved through the one-pot, three-component tandem reaction of diazo compounds with anilines and beta,gamma-unsaturated alpha-ketoesters in moderate to good yields.