Abstract: This invention relates to a process for producing benzotriazoles which comprises effecting a mixture in an aqueous medium of at least one aromatic orthodiamine and one or more nitrites and heating the mixture to temperatures ranging up to about 350.degree. C. while maintaining pressures at levels sufficient to keep effective amounts of water present for the reaction.

Abstract: There is disclosed a process for the preparation of dihydroxyquinoline and certain derivatives thereof. The compounds have the structure: ##STR1## where X=Cl, Br, I, NO.sub.2, HY=--CN, --H --COOHThe process comprises the reaction of isatoic anhydride or its derivatives with alkyl esters of cyanoacetic acid to form an intermediate compound such as 2-(2'-aminobenzoyl)cyanoacetate which subsequently undergoes cyclization to form 3-cyano-2,4-diydroxyquinoline (when X is hydrogen) or its derivatives (where X is Cl, Br, I or NO.sub.2). The cyano group may be cleaved under alkaline conditions to convert Y from --CN to --H or under acid conditions to convert Y from --CN to --COOH.

Abstract: This invention is directed to a process for preparing 1,2-diaminobenzene which comprises acid hydrolyzing 2-benzimidazolone in an aqueous medium at elevated temperatures and pressures.

Abstract: A method for producing a mixture of a dithiodibenzoate, a dithiocarbonate, and a trithiocarbonate, is disclosed. The method includes diazotizing an amine having the formula ##STR1## where R is hydrogen, or an alkyl group having not more than 4 carbon atoms, and coupling the resulting diazonium with at least 1 gram-mole of carbon disulfide per gram-mole of the diazonium in the presence of a copper catalyst. Under appropriate conditions, which include a reaction temperature in the range of 10.degree.-32.degree. C., sufficient time for full coupling to occur, and dissolving of the CS.sub.2 in a suitable water-miscible solvent such as methanol, coupling to said mixture readily occurs. The coupling products are then dissolved and removed by use of a water-immiscible inert solvent.

Abstract: This invention is directed to a process of preparing thioxanthones derived from ortho-chlorosulfenylbenzoyl chloride and aromatic compounds in the presence of Friedel-Crafts catalyst.