Patents
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Patents for C07C 46 - Preparation of quinones (1,836)
04/1983
04/06/1983EP0075828A1 Oxidizing fused ring compounds to quinones with aqueous acidic solutions of cerium
04/05/1983US4379092 Process for the preparation of anthraquinone and its substituted derivatives
02/1983
02/22/1983US4374984 Aromatic-aliphatic ketones useful as photoinitiators
02/22/1983US4374775 Oxidation
02/15/1983US4374290 Process for preparing vitamin K
02/09/1983EP0071281A2 Hydroformylation process
02/01/1983US4371604 Photographic material suited for use in diffusion transfer photography
01/1983
01/26/1983EP0070665A1 Process for oxidising phenol to P-benzoquinone
01/25/1983US4370497 Oxidation process using tellurium oxide catalysts
01/18/1983US4369140 Diels-alder reaction of naphthoquinone and conjugated diolefin
01/04/1983CA1138606A1 Recovery of anthraquinone from tall oil
12/1982
12/14/1982CA1137502A1 Process for purifying naphthoquinone
12/07/1982US4362668 Substituted ortho-quinone dimer
11/1982
11/24/1982EP0065368A1 A process for preparing chromans
11/23/1982US4360469 Preparation of quinones by salcomine-catalyzed oxidation of phenols
11/16/1982CA1135713A1 Quinone derivatives
11/02/1982CA1134802A1 Coated catalysts and their preparation
10/1982
10/28/1982WO1982003625A1 Method for the oxidation of reactive aromatics
10/26/1982CA1134192A1 Diffusion transfer photographic material containing a quinone-type compound with photographically useful group and ballast group
10/12/1982US4354048 Oxidative dehydrogenation with formation of carbon-carbon bond
10/12/1982US4354047 Nickel catalysts for oxidative coupling of phenols
10/05/1982CA1132996A1 Process for producing naphthoquinone
09/1982
09/28/1982US4351774 Process for the production of methoxyanthraquinones
09/01/1982EP0058945A2 A process for preparing an optically active d-alpha-tocopherol and compounds for its preparation
08/1982
08/24/1982US4346103 Multiple sclerosis
08/18/1982EP0058057A1 Method of producing quinone derivatives
08/17/1982US4345016 Homo- or copolymers of unsaturated sulfonyl hydroqinones as scavengers for oxidized developers; antifogging agents
08/03/1982CA1128953A1 Method for preparing para-benzoquinones
07/1982
07/20/1982EP0047781A4 Dye-forming developers.
07/14/1982EP0055951A1 Process for the preparation of anthraquinone and its substituted derivatives
06/1982
06/22/1982CA1126267A1 Improved process for preparing anthraquinone in an aqueous solution
06/02/1982EP0052853A1 Bis-aminomethyl-anthraquinone derivatives, process for their manufacture, compositions containing them and their use
05/1982
05/25/1982CA1124234A1 Anthracycline synthesis
04/1982
04/06/1982US4323431 Controlled pressure in a continuous rectification process
03/1982
03/24/1982EP0047781A1 Dye-forming developers.
03/16/1982US4320065 Process for preparing vitamin K
03/02/1982US4317745 Catalytic oxidation of phenols to 1,4-benzoquinones
02/1982
02/23/1982US4316985 Cyclic compounds
02/23/1982CA1118797A1 Catalytic oxidation/decarbonylation of polynuclear aromatic compounds
02/16/1982CA1118355A1 Compsitions containing alkannin derivatives for treating skin disorders
02/02/1982US4313887 Anthraquinone dyes
01/1982
01/26/1982US4312811 Dehydrochlorination of ortho-benzoylbenzoic acid chloride
01/19/1982US4311565 Electrochemical process for the production of benzanthrone
01/13/1982EP0043435A1 Intermediate products occurring in anthracycline synthesis
01/12/1982US4310465 Oxidation in a nitrosodisulfonate quaternary ammonium salt
12/1981
12/29/1981US4308211 Octahydroanthraquinone, melt, catalyst of group 8 metal or oxide, dehydrogenation
12/15/1981US4305879 Process for producing a 2-tertiary-alkyl substituted anthraquinones
12/08/1981US4304724 Process for the manufacture of anthraquinone
11/1981
11/25/1981EP0023923A4 Compounds and catalysts containing phosphorus, arsenic or nitrogen and their use in hydrocarbon conversion processes.
11/17/1981US4301243 Photographic recording material
10/1981
10/28/1981EP0038777A1 Process for the preparation of OH or chloro derivatives of quinizarine bisubstituted in position 5 and 8
10/27/1981US4297514 Method of oxidizing compounds having activated methylene radicals
10/21/1981EP0038160A1 Quinone compounds, their production and use
10/21/1981EP0038092A1 Photographic material suited for use in diffusion transfer photography
10/01/1981WO1981002797A1 Dye-forming developers
09/1981
09/30/1981EP0036502A1 2-Alkyl-5-hydroxy-1,4-naphthoquinones, process for their manufacture and pharmaceutical preparations containing these compounds
09/22/1981CA1109481A1 Process for the preparation of para-benzoquinone
09/16/1981EP0035635A1 Process for the preparation of trimethyl benzoquinone
08/1981
08/18/1981US4284576 And naphthalene and phthalic anhydride, reacting with oxygen
08/04/1981US4282250 Remedy for skin injuries and diseases
07/1981
07/28/1981CA1105927A1 Triple ions of 1,2-and 1,4-dicarbonyl compounds and analogs thereof containing nitrogen and containing two strategic oxygen or nitrogen groups and process for producing same
07/16/1981EP0024091A4 Hydroformylation process and novel transition metal catalysts.
07/16/1981EP0023924A4 Tetraalkyl phosphonium substituted phosphine and amine substituted transition metal complexes.
07/14/1981US4278607 Etherification, denitration, amidosulfonic acid catalysts
07/08/1981EP0031727A2 Medicinal compositions comprising as an active ingredient substituted 1,4-benzoquinones
07/08/1981EP0031573A1 Process for the preparation of 2-methyl-1,4-naphthoquinone
07/07/1981US4277257 Process for preventing scale deposition
06/1981
06/02/1981US4271083 6-Hydroxy-1,4-benzoquinone compounds
04/1981
04/22/1981EP0027400A1 Preparation of naphthoquinone-1,4
04/14/1981US4261909 Process for the reductive removal of halogen atoms from anthraquinones
03/1981
03/31/1981CA1098532A1 No translation available
03/25/1981EP0025620A1 Process for the preparation of substituted anthraquinones
03/24/1981US4257968 Oxidation of phenol to p-benzoquinone in acetonitrile/methanol cosolvent
03/24/1981US4257851 Reducing the acid content before reduced pressure distillation
03/10/1981US4255405 Naphthoquinone anti-psoriatic agents
03/10/1981US4255343 Preparation of 2-T-alkylanthracene
03/10/1981US4255342 Liquid phase reaction of an alkali metal phenoxide and a nitro andor halo-substituted anthraquinone; solvent recovery
03/10/1981US4255285 For the catalytic oxidation of a 1-phenylindan to an anthraquinone; atomizing an aqueous vanadium compound to coat and roast moving carrier particles
03/10/1981CA1097343A1 Intermediates for polycyclic quinonoid antibiotics
03/10/1981CA1097342A1 Intermediates for polycyclic quinonoid antibiotics
02/1981
02/25/1981EP0024091A1 Hydroformylation process and novel transition metal catalysts.
02/25/1981EP0024088A1 Process for the preparation of aldehydes
02/18/1981EP0023924A1 Tetraalkyl phosphonium substituted phosphine and amine substituted transition metal complexes.
02/18/1981EP0023923A1 Compounds and catalysts containing phosphorus, arsenic or nitrogen and their use in hydrocarbon conversion processes.
02/10/1981US4250335 Using dibutyl ether and water to separate the 2,3,5-p-quinone intermediate, the cobalt complex catalyst, and the dimethylformamide solvent; liquid phase hydrogenation
01/1981
01/13/1981US4244968 Hydroxy- and amino-anthraquinones
01/13/1981US4244880 Anthracycline synthesis
01/07/1981EP0022062A1 Electrochemical process for the production of benzanthrone
01/07/1981EP0021841A2 2,3-Dialkoxy-1,4-quinone derivatives; method of producing 1,4-quinone derivatives
01/06/1981US4243598 1,2-epoxy-2,6,10,14-tetramethylpentadecane as a chemical intermediate
12/1980
12/23/1980US4240974 Fire retardant sulfonate compound
12/16/1980CA1091680A1 Method for production of quinones
11/1980
11/25/1980US4235790 Process for separating p-benzoquinone from the reaction products of phenol oxidation as quinhydrone
11/18/1980US4234749 Production of benzene
11/18/1980US4234746 Intermediates for synthesizing 3-prenyl-2-alkylmenaquinones
11/04/1980US4232107 Photographic material suited for use in diffusion transfer photography and method of diffusion transfer photography using such material
10/1980
10/28/1980CA1088556A1 Continuous oxidation of tetrachlorocatechol to o- chloranil
10/21/1980US4229478 Naphthaquinone anti-psoriatic agents
10/21/1980US4229356 Catalytic alkylation of 2-methyl-1,4-naphthalenediol
10/07/1980US4226783 α-Chlorination process
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