B-Catalyzed Carbonylation of Carbon Tetrahalides: Using a Broad Range of Visible Light to Access Diverse Carbonyl Compounds.

Visible-light-driven organic synthesis is a green and sustainable method for producing fine chemicals and is highly desirable at both laboratory and industrial scales. In this study, we developed a broad-range (including the red region) visible-light-driven carbonylation of CCl, CBr, and CBrF with nucleophiles, such as amines and alcohols, using a B-Mg/TiO hybrid catalyst. Carbonyl molecules such as ureas, carbamates, carbonate esters, and carbamoyl fluorides were synthesized with high selectivity and efficiency under mild conditions.

Green Molecular Transformation in Dual Catalysis: Photoredox Activation of Vitamin B Using Heterogeneous Photocatalyst.

This concept focuses on dual-catalysis using metal complexes and heterogeneous photocatalysts. Vitamin B derivatives are sophisticated metal complexes that facilitate enzymatic reactions in the biological systems. The B enzymes inspired reactions catalytically proceed in dual-catalyst systems of B derivatives and heterogeneous photocatalysts, such as titanium oxide (TiO) and metal-organic frameworks (MOFs), under light irradiation.

Effect of Macrocycles on the Photochemical and Electrochemical Properties of Cobalt-Dehydrocorrin Complex: Formation and Investigation of Co(I) Species.

Co(II)-pyrocobester (), a dehydrocorrin complex, was semisynthesized from vitamin B (cyanocobalamin), and its photochemical and electrochemical properties were investigated and compared to those of the cobester (), the cobalt-corrin complex. The UV-vis absorptions of in CHCl, ascribed to the π-π* transition, were red-shifted compared to those of due to the π-expansion of the macrocycle in the pyrocobester. The reversible redox couple of was observed at = -0.

4-Amino-TEMPO-Immobilized Polymer Monolith: Preparations, and Recycling Performance of Catalyst for Alcohol Oxidation.

Continuous flow reactors with immobilized catalysts are in great demand in various industries, to achieve easy separation, regeneration, and recycling of catalysts from products. Oxidation of alcohols with 4-amino-TEMPO-immobilized monolith catalyst was investigated in batch and continuous flow systems. The polymer monoliths were prepared by polymerization-induced phase separation using styrene derivatives, and 4-amino-TEMPO was immobilized on the polymer monolith with a flow reaction.

Synthesis of a B-BODIPY dyad for B-inspired photochemical transformations of a trichloromethylated organic compound.

A B complex-BODIPY dyad was synthesized by peripheral modification of cobalamin derivatives. The photophysical properties of the dyad were investigated by UV-vis, PL, and transient absorption spectroscopy. A visible light-driven dechlorination reaction of a trichlorinated organic compound, DDT, was reported.