The Ce(III)-photocatalyzed synthesis of amides fromcarboxylicacids and aryl isocyanates was developed. The reaction includes the formation of alkyl radicals fromcarboxylicacids followed by radical addition to the electron-deficient carbon of isocyanate.
Methods are described for the preparation of combinatorial libraries of potentially biologically active disaccharide compounds. These compounds are variously functionalized, with a view to varying lipid solubility size, function an other properties, with the particular aim of discovering novel drug or drug-like compounds, or compounds with useful properties. The invention provides intermediates, processes and synthetic strategies for the solution or solid phase synthesis of disaccharides, variously functionalized about the sugar ring, including the addition of aromaticity and charge, and the placement of pharmaceutically useful groups and isosteres.
The present invention concerns a process for producing a polyarylene sulfide of high whiteness from an alkali metal sulfide and a dihalogenated aromatic compound, wherein a reaction product obtained by reacting alkali metal sulfide (M²₂S) and at least one ingredient (M¹X) selected from the group consisting of alkali metal halide and alkaline earth metal halide under the presence of water and polar solvent and separating by solid-liquid separation are brought into contact with a dihalogenated aromatic compound.