A process for the manufacture of dianthraquinonyl-N,N'-dihydroazine, which comprises reacting 1-nitroanthraquinone in mixtures of water, alcohols and alkali metal hydroxides at elevated temperature with hydrazine or hydroxylamine compounds, subsequently removing the alcoholic constituents from the reaction mixture, adding dimethyl sulfoxide, and, if desired, further amounts of alkali metal hydroxides, and bringing the reaction to completion at elevated temperature.

A process for preparing dianthraquinone-N,N'-dihydroazine (I) ##STR1## and its chlorination products (Ia) ##STR2## where n is 1 or 2, by condensation of 1-aminoanthraquinone (II) in the presence of an alkaline condensing aid, an oxidizing agent and a cyclic urea derivative at from 80.degree. to 150.degree. C. and subsequent purification and/or chlorination comprises using N,N'-dimethylpropyleneurea as the urea derivative.

7,16-Dichlorodianthraquinone-N,N'-dihydroazine (I) ##STR1## is prepared by condensing 1-amino-3-chloroanthraquinone (II) in the presence of an alkaline condensing aid, of an oxidizing agent and of a urea derivative (III) ##STR2## (R: identical or different alkyl groups having 1 to 4 carbon atoms, which may be joined together to form a 5- or 6-membered ring that contains the urea group).

A process for producing dianthraquinone-N,N'-dihydrazine or its chlorination product, which comprises condensing 1-aminoanthraquinone at an elevated temperature in the presence of 1,3-dimethyl-2-imidazolidinone using an oxidizing agent and an alkaline condensing agent, and subjecting the resulting condensation product to a treatment known per se.

An .alpha.-indanthrone pigment having improved tinctorial and technological properties is produced by swelling .gamma.-indanthrone in sulfuric acid of from 73 to 80 percent strength by weight at from 20.degree. to 50.degree. C. in the presence of from 0.1 to 20% by weight, based on indanthrone, of a hydroxylammonium salt, a hydrazinium salt, amidosulfonic acid, urea, a salt of urea, formaldehyde or paraformaldehyde or a mixture of these. After precipitation in water which may or may not contain ...

A process for preparing organic isocyanate compounds characterized by reacting a chloromethyl group-containing compound having the formula: wherein X, which can be the same or different, is chlorine, alkyl, cycloalkyl, alkenyl, phenyl, chloromethylphenyl or chloromethyl, n is 0 or an integer of 1 to 3, and R is an aromatic hydrocarbon radical or an olefin radical, With an alkali cyanate, in the presence of a catalyst composition comprising (a) a cuprous salt in an amount of 0.1 to 20% by weight,...

Hexaazatriphenylene hexanitrile and various derivatives therefrom including its hexacarboxamide, hexacarboxylic acid and hexaacid salts and metal complexes, lower alkyl hexaesters of the hexacarboxylic acid, and hexacarboxylic trisanhydride are described along with their preparations initiating with reacting hexaketocyclohexane octahydrate with excess diaminomaleonitrile in acetic acid, preferably at reflux temperature, to provide the hexanitrile from which the other derivatives are prepared.

The present invention relates to novel 3,3-(disubstituted)cyclohexan-1-carboxylate monomers and related compounds, pharmaceutical compositions containing these compounds, and their use in treating allergic and inflammatory diseases and for inhibiting the production of Tumor Necrosis Factor (TNF).

Diketopiperazine compounds designated N-methylepiamauromine, epiamauromine and cycloechinulin have been isolated from the sclerotia of the fungi Aspergillus ochraceus. The compounds are effective for controlling Coleopteran and Lepidopteran insects. The compounds have the structures: ##STR1## wherein: R is a hydrogen atom or a methyl group, such that the compound formed when R is a hydrogen atom is designated epiamauromine and the compound formed when R is a methyl group is designated N-methylep...

A process for the preparation of a vat dye of the dianthraquinone-azine or dianthraquinone-N,N'-dihydroazine series, or a higher cyclic homologue thereof, which comprises reacting a primary amine selected from the group consisting of amino anthraquinones, their substitution products and higher cyclic homologues, with an alkaline condensing agent, wherein reaction is effected in the presence of at least one oxide of an organic derivative of a metalloid element of Group 5B of the Periodic Classifi...