Patents
Sitemap › C07 - Organic chemistry › C07C - Acyclic or carbocyclic compounds › C07C 46 - Preparation of quinones
Patents for C07C 46 - Preparation of quinones (1,836)
11/2011
11/09/2011CN101367717B Total synthesis method of despinner alkannin
10/2011
10/27/2011US20110263904 Yield-efficient process for the production of highly pure 2-methyl-1,4-naphthoquinone and its derivatives
10/26/2011CN101456803B Method for purifying hypericin
10/19/2011CN102220387A Method for extracting and purifying resveratrol and emodin from fresh giant knotweed
10/19/2011CN102219768A Perylenequinone compounds and their extraction and separation method and use
10/19/2011CN102219665A Method for synthesizing 2,3,5-trimethylbenzoquinone and 2,3,5-trimethylhydroquinone
10/19/2011CN101429108B Purification method for separation of cozymase Q10
10/12/2011CN102216248A Process for the preparation of vitamin k2
10/11/2011CA2442151C Stable solution of reduced coenzyme q
09/2011
09/28/2011CN102199081A 2-acetylaloeemodin and preparation method and application thereof
09/28/2011CN102199080A Method for preparing shikonin with high optical purity by asymmetric total synthetic method
09/22/2011WO2011113284A1 Shikonin naphthazarin derivatives, preparation method and antitumor use thereof
09/21/2011EP2366684A1 New compounds of the pterocarpanquinone family, method for preparing the same, pharmaceutical composition containing the new compounds of the pterocarpanquinone family, uses and therapeutic method
09/15/2011WO2011112679A1 Synthesis of alpha-tocopherolquinone derivatives, and methods of using the same
09/15/2011CA2792520A1 Synthesis of alpha-tocopherolquinone derivatives, and methods of using the same
09/14/2011CN102180782A Method for synthesizing hypericin
08/2011
08/31/2011CN102167721A Method for extracting and purifying tanshinone monomeric compounds from red sage root
08/17/2011CN102153457A Method for preparing 2,3,5-trimethyl hydroquinone intermediate (2,3,5-trimethyl benzoquinone) by unsym-trimethyl benzene oxidation
08/10/2011CN101475461B Iodogen method for preparation of hypericin radioactive iodine marker
08/03/2011CN102140060A Method for extracting and separating crude extracts of carambola root quinones chemical components
07/2011
07/27/2011EP2346806A1 Process for the preparation of vitamin k2
07/27/2011CN102134188A Tetrahydroanthraquinone compound Prisconnatacin and preparation method and application thereof in preparation of anti-tumor medicaments
07/21/2011WO2011085945A1 Yield-efficient process for the production of highly pure 2-methyl-1,4-naphthoquinone and its derivatives
07/20/2011EP2345631A1 Yield-efficient process for the production of highly pure 2-methyl-1,4-naphthoquinone and its derivatives
07/20/2011CN102126942A Method for synthesizing hypericin
07/20/2011CN101205176B Optimum process for extracting anthraquinone components from rhubarb horsetails by cell ultrasonication
06/2011
06/29/2011CN102108047A Method for preparing 2,3,5-trimethylhydroquinone
06/22/2011CN102105427A Atovaquone with a particle size diameter range (D90) of greater than 3 [mu]m to about 10 [mu]m
06/16/2011US20110144347 Process for the epimerization of atovaquone isomer, atovaquone intermediates and mixture thereof
06/09/2011US20110137084 Method for producing pure or enriched q10 coenzyme
06/01/2011CN102079696A Hypericin purifying method
05/2011
05/26/2011US20110123505 Method of producing reduced coenzyme q10 and method of stabilizing the same
05/25/2011CN102070432A Novel preparation method for hypocrellin B serving as photosensitizer
05/25/2011CN102070431A Method for synthesizing saprorthoquinone
05/18/2011CN102060397A Method for treating waste water generated in extraction process of active ingredient of polygonum cuspidatum
05/18/2011CN102059124A Method for preparing anthraquinone catalyst by oxidizing refined anthracene
05/11/2011EP2318350A1 ATOVAQUONE WITH A PARTICLE SIZE DIAMETER RANGE (D90) OF GREATER THAN 3 muM TO ABOUT 10 muM
05/11/2011CN102050717A Dysideavillosa element A, element B and element C as well as preparation method and application thereof in preparation of drugs
05/11/2011CN102050716A Method for separating and purifying 2-ethyl anthraquinone from sulphuric acid
05/11/2011CN102048716A New application of hydroquinone compound
05/04/2011CN101274884B Process for extracting bacterial cell coenzyme Q10
04/2011
04/27/2011CN1907933B Desorption method of methyl-ethyl ketone rich solvent
04/14/2011WO2010035000A8 Process for the preparation of vitamin k2
04/13/2011EP2307373A1 A process for preparing atovaquone and associate intermediates
04/13/2011EP2307343A1 Process for the epimerization of atovaquone isomer, atovaquone intermediates and mixture thereof
04/13/2011CN102010316A Method for extracting high-purity frangula emodin from polygonum cuspidatum
04/13/2011CN102010315A Method for synthesizing naphthazarin and derivatives thereof
03/2011
03/24/2011WO2011034922A1 Methods for preparing hypericin
03/23/2011CN101987815A Purification process for preparing high-purity coenzyme Q10
03/17/2011WO2011030350A1 Eco-friendly method for catalytic aerial oxidation of aloe-emodin to rheinal
03/16/2011CN101985102A Online regeneration method for chromatographic silica gel of coenzyme Q10
02/2011
02/24/2011WO2011022286A1 Quinhydrone-containing sensor
02/16/2011CN101973864A Method for extracting shikonin from lithospermum
02/09/2011CN101967090A Technology for extracting aurantio-obtusin
02/09/2011CN101967089A Preparation method of plumbagin
01/2011
01/12/2011CN101941898A Purification method of vitamin K3
12/2010
12/08/2010CN101906030A Method for extracting juglone from walnut green husk residue by microwave reflux
12/08/2010CN101906028A Method for extracting benzoquinone compound in lithospermum
12/08/2010CN101462066B Catalyst for preparing naphthaquinone and preparation method thereof
12/08/2010CN101265172B Technique for synthesizing buparvaquone
12/07/2010US7847112 Polymorphs of atovaquone and process of preparation thereof
12/01/2010CN101260030B Method for preparing 2,3,5-trimethylbenzoquinone by using ionic liquid carrying catalyst
11/2010
11/24/2010EP2252569A2 Antiinfective and antitumoral compounds isolated from tropical lianas
11/17/2010EP2250145A2 Preparation of naphthoquinone compounds using 2, 3-dihalonapthoquinone
10/2010
10/28/2010WO2010121638A1 Recovery of vitamin k3 from mother liquor
10/27/2010EP2243765A1 Recovery of vitamin K3 mother liquor
10/27/2010EP2243764A1 Method for producing substituted 1,4 chinonmethides
10/27/2010CN101869591A Method for producing alkannin by utilizing Arnebia euchroma(Royle)Johnst hairy root
10/21/2010CA2701201A1 Process for preparing substituted 1,4-quinone methides
10/20/2010CN101863752A Method for synthesizing 1-chloroanthraquinone through direct chlorination of chlorine gas
10/13/2010CN101857538A Method for extracting frangula emodin from giant knotweed
10/07/2010WO2010113900A1 Production method for ubiquinone powder for use in preparations and product thereof
10/07/2010CA2757190A1 Production method for ubiquinone powder for use in preparations and product thereof
09/2010
09/15/2010CN101830792A Vitamin K3 derivatives serving as IDO inhibitor
08/2010
08/26/2010WO2009122432A3 Preparation of naphthoquinone compounds using 2, 3-dihalonapthoquinone
08/18/2010CN101113132B Method for preparing high-purity hypocrellin B
08/12/2010WO2010023686A3 Crystalline form of 2-chloro-3-[4-(4-chlorophenyl) cyclohexyl] [1,4]naphthoquinone, process for the same and use for producing 2-[4-(4-chlorophenyl)cyclohexyl]-3-hydroxy-1,4] naphthoquinone
08/11/2010EP2216315A1 Novel crystalline forms of atovaquone
08/11/2010CN101182290B Shikonin dimethyl ether 6-site side chain isomer as well as derivatives and synthesis method thereof
08/11/2010CN101092340B Method for synthesizing products in vitamin K2 series
08/04/2010EP2213647A1 Novel crystalline forms of atovaquone
08/04/2010EP2213646A1 Novel crystalline forms of atovaquone
07/2010
07/21/2010CN1931818B Coenzyme Q10 synthesizing process
07/21/2010CN101781179A Method for preparing 1,2-naphthoquinone compound
07/21/2010CN101333158B Method for preparing idebenone
07/21/2010CN101139274B Method for synthesizing coenzyme Q10 by olefin metathetical reaction
07/14/2010CN101774901A Method for preparing atovaquone
07/13/2010CA2377214C Hydrogenation of a working solution in a hydrogen peroxide production process
07/07/2010CN101219942B Method for extraction separation of total anthraquinone compounds
06/2010
06/30/2010CN101759549A Method for preparing hypericins
06/30/2010CN101759547A Preparation method of 2-hydroxy-1, 4-naphthoquinone
06/23/2010CN101744890A Method for refining hypericin in hypericum perfortum extract
06/23/2010CN101744794A New natural hypericin antiviral drug
06/02/2010CN101717329A Synthesis method of chloroanthraquinone
06/02/2010CN101285048B Rhodobacter sphaeroides mutant strain and uses thereof
06/02/2010CN101265171B Technique for synthesizing atovaquone
06/02/2010CN100999452B Method of synthesizing seratrodast
05/2010
05/26/2010CN101711779A Application of Selaginella pulvinata (Hook.et Grev.) Maxim. extract in preparing medicaments for resisting Alzheimer diseases
05/26/2010CN101050170B New type natural active compound for anti tumor, preparation method, and application
05/20/2010WO2010054452A1 New compounds of the pterocarpanquinone family, method for preparing the same, pharmaceutical composition containing the new compounds of the pterocarpanquinone family, uses and therapeutic method
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