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7604968 |
Microorganisms for the recombinant production of resveratrol and other flavonoids
The invention provides methods and materials related to producing flavonoids as well as other organic compounds. For example, the invention provides isolated nucleic acids, polypeptides, host...
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7586012 |
Process for recovering an adduct of a bis(4-hydroxyaryl)alkane and a phenolic compound
A process for recovering a solid adduct of a bis(4-hydroxyaryl)alkane and a phenolic compound from a suspension comprising the addict is disclosed. The process comprises the steps of a) supplying...
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7268260 |
Fluorine-containing bisphenols, their preparation, their precursors and intermediates, and use of the fluorine-containing bisphenols
This invention relates to 1,2-di(4-hydroxyaryl)tetrafluoroethanes of the general formula (I)
wherein
R are each, independently of one another, hydrogen, F, Cl, Br, I, CN, COOR 2 , C 1 -C 4...
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7163961 |
Drugs, foods and oral compositions containing stilbene-type compounds
The present invention provides a composition for preventing or treating diseases accompanied by a decrease in bone weight, hypertension and diseases resulting from hypertension, the composition...
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7112704 |
Fluorine-containing bisphenols, their preparation, their precursors and intermediates, and use of the fluorine-containing bisphenols
This invention relates to 1,2-di(4-hydroxyaryl)tetrafluoroethanes of the general formula (I)
wherein
R are each, independently of one another, hydrogen, F, Cl, Br, I, CN, COOR 2 , C 1 –C 4...
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7026518 |
Resveratrol analogs
Novel resveratrol analogs that are potent antioxidants. The resveratrol analogs are illustrated in the following general formula I:
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6900356 |
Polyhydroxy curcumins having antioxidant activity
This invention relates to novel polyhydroxy curcumins of the formula (I), wherein R and R 1 may be same or different and are selected from H, OH and OCH 3 . This invention also includes a process...
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6844471 |
Method for the conversion of a Z-isomer into E-isomer
A method of converting (Z)-1-(3,5-disubstituted phenyl)-2-(4-substituted phenyl)ethene of general formula (II) to (E)-1-(3,5-disubstituted phenyl)-2-(4-substituted phenyl)ethene of general formula...
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6828439 |
Compounds, composition, and methods for photodynamic therapy
Disclosed are novel compounds, compositions, and methods that are particularly useful in photodynamic therapy. In particular, the inventive compounds, compositions, and methods relate to the...
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6433236 |
Acid catalyzed isomerization of substituted diaryls
A substituted diaryl compound or a mixture of substituted diaryl compounds, such as dimethylbiaryl compounds are isomerized by treatment with a strong acid or mixtures of strong acids in the...
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6395910 |
Production method of 5-phthalancarbonitrile compound, intermediate therefor and production method of the intermediate
The present invention provides a production method of a 5-phthalancarbonitrile compound, which comprises the use of a novel compound of the formula [I] wherein X is chlorine atom, bromine atom or...
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6365787 |
Compounds for the suppression of HIV TAT transactivation
The present invention reveals the isolation, purification and characterization from the creosote bush Larrea tridentata of compounds of the structural formula: where R 1 , R 2 , R 3 and R 4 ...
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6365788 |
Preparation of 1,2-bis(4-hydroxyphenyl)-2-hydroxypropanes
The present invention relates to the preparation of substituted or unsubstituted 1,2-bis(4-hydroxyphenyl)-hydroxyaliphatics such as 1,2-bis(4-hydroxyphenyl)-2-hydroxypropanes by reacting...
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6049014 |
Process for the manufacture of tetrabromobisphenol-A with co-production of n-propyl bromide
A process for producing n-propyl bromide during the bromination of bis- or trisphenols uses non-aqueous n-propanol as the bromination solvent, providing salable yields of n-propyl bromide to...
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5939509 |
Epoxy resin, resin composition, and resin-encapsulated semiconductor device
The stilbene epoxy resin having two different aryl groups and an epoxy resin mixture including this stilbene epoxy resin have lower melting points than those of the stilbene epoxy resin having two...
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5880314 |
Hydrochalcone derivatives, cosmetic compositions containing said derivatives and methods of producing the same
The present invention can provide cosmetic formulations comprising hydrochalcone compounds of the general formula (I): ##STR1## in which R 1 to R 4 are each independently H or --COR, and R is an...
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5874647 |
Benzene hydroxylation catalyst stability by acid treatment
A zeolite catalyst for hydroxylating benzene to phenol is treated hydrothermally with a gas comprising approximately 1-100 mole percent water at a temperature between approximately 350°-950° C.,...
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5874645 |
Process for the preparation and purification of 4,4'-dihydroxy-alpha-substituted stilbene
A process which includes the step of heating a compound of Formula (I): ##STR1## wherein R 1 is a hydroxyphenyl group or a group of Formula (II): ##STR2## and R 2 , R 3 , R 4 , R 5 and R 6 are...
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5741822 |
Mixed lipid-bicarbonate colloidal particles for delivering drugs
A composition is disclosed containing non-esterified fatty acids having 14-18 carbon atoms, monoglycerides which are monoesters of glycerol and fatty acids having 14-18 carbon atoms,...
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5723692 |
Preparation of 4,4'-dihydroxy-'alkylstiblbene with reduced dimer formation
Preparation of dihydroxy-α-alkylstilbenes with reduced undesirable by-products can be achieved by carrying out dehydrohalogenation of a substantially uniform dispersion of a halogenated...
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5723693 |
Process for preparing and recovering 4,4'-dihydroxy-alpha-alkylstilbene or 4,4'-dihydroxy-alpha, alpha'dialkylstilbene
A process for preparing a 4,4'-dihydroxy-alpha-alkylstilbene or 4,4'-dihydroxy-alpha,alpha'-dialkylstilbene which includes the steps of (A) reacting at a temperature of from -20° C. to 20° C. a...
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5545399 |
Cosmetic composition
A composition for topical application to the skin in order to promote the repair of photo-damaged or aged skin and/or to reduce or prevent damaging effects of ultra-violet light on skin and/or to...
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5475154 |
Method for producing high-purity bisphenols
Low-color bisphenols may be produced by condensing phenol with ketones in the presence of a strong-acid cation exchange resin acting as an acid catalyst for the condensation reaction, and of a...
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5473003 |
Alkanediphenols
Compositions comprising an organic material which is sensitive to thermal, oxidative and/or actinic degradation and at least one compound of the formula I ##STR1## in which Z 1 and Z 2 ...
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5414150 |
Preparation of 4,4'-dihydroxy-alpha-alkylstilbenes and 4,4'-dihydroxy-alpha, alpha'-dialkylstilbenes
4,4'-Dihydroxy-alpha-alkylstilbenes of high purity are prepared by reacting at a temperature of from about -20° C. to about 20° C. a mixture of (1) at least one alpha-haloketone, (2) at least one...
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5306748 |
Fluorine-modified thermosetting resin and thermosetting resin composition
Fluorine-modified thermosetting reins are available as phenolic or epoxy resins having trifluoromethyl groups and a naphthalene skeleton in a molecule. They are useful as components of resin...
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5185454 |
Process for the preparation of symmetrical diarylacetylenes
Symmetrical diaryl-acetylenes can be prepared by reacting an aryl halide with acetylene in the presence of a palladium catalyst and a base. If the acetylene is introduced into the liquid reaction...
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5138103 |
Process for producing tetrabromobisphenol A
A process for producing tetrabromobisphenol A of high quality, which comprises brominating bisphenol A with bromine, wherein a solvent mixture comprising a hydrohalogenic acid and an alcohol, is...
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5136114 |
Process for the preparation of geminal diarylalkanes, new geminal diarylalkanes and alk(en)ylated aromatic compounds
The invention relates to a new process for the preparation of geminal diarylalkanes of the formula ##STR1## by Friedel-Crafts alkylation of aromatic compounds with specific aliphatic halogen...
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5008471 |
Process for the preparation of rooperol
As a process for preparing a compound of the formula ##STR1## in which both Rs are H or --OH comprising the steps: a. of treating the ethyl ester of caffeic acid with a trialkylsilyl chloride at...
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4962240 |
Method for symmetrically dimerizing phenols and process for producing biphenols
A method for symmetrically dimerizing phenols which comprises oxidizing phenols in molten state in the liquid phase using a transition metal compound as a catalyst and an oxygen-containing gas as...
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4960956 |
Modified bisphenols having at least one arylcyclobutenealkyl moiety and cured products therefrom
Ring-arylcyclobutenealkylated di(hydroxyphenyl) compounds having at least one arylcyclobutenealkyl moiety attached to at least one of the phenyl rings self-cure upon heating to produce rigid,...
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4956502 |
Process for the preparation of rooperol derivative
A process for preparing a compound of the formula ##STR1## in which both Rs and H or OH; comprising the steps a. of treating the ethyl ester of caffeic acid with trialkylsilyl chloride at ambient...
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4954659 |
1,4-bis (dihydroxyphenyl) butane and analogs
A grignard synthesis of pharmacologically active 1,4-bis(dihydroxyphenyl)butane and analogs, as well as novel intermediates, is provided, comprising preparing a grignard reagent preferably, a...
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4927973 |
Process for continuous purification of bisphenols
A process for the continuous purification of crude bisphenol which comprises (1) forming a single liquid phase comprising a hot mixture of crude bisphenol and water in a ratio substantially of from...
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4791234 |
Substantially pure spirobiindane bisphenols and method for their preparation
Spirobiindane bisphenols of high purity, suitable for conversion to high molecular weight polycarbonates, are prepared by reacting a bisphenol or 4-isopropenylphenol with a metal halide Lewis acid...
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4778936 |
Triphenol compound
A triphenol type compound represented by the following formula: ##STR1## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 independently represent hydrogen, a halogen, a C 1 -C 5 alkyl group or a C 1...
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4745233 |
Derivatives of 1,1,2,2-tetramethyl-1,2-bis-(2-fluoro-4-hydroxyphenyl)-ethane
Antitumor compounds corresponding to the following formula: ##STR1## in which the substituents R 1 and R 2 may be the same or different and represent hydrogen, an aminocarbonyl group, a C 1 -C 6...
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4716252 |
Process for the preparation of bis-hydroxyphenyl-n-alkanes, new bis-hydroxyphenyl-n-alkanes and new alkanediones
Bis-hydroxyphenyl-n-alkanes are prepared by contacting dicarboxylic acids or dicarboxylic acid derivatives with fluorine-containing organic sulphonic acids, where appropriate with the addition of a...
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4705901 |
Brominated hydroxyaromatic compounds
Prepare novel ring-brominated derivatives of tetraalkyl dihydroxy diaromatic compounds, e.g. 4,4'-(1,2-ethanediyl)bis(3,5-dibromo-2,6-dimethyl-phenol).
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4701566 |
Method for preparing spirobiindane bisphenols
Spirobiindane bisphenols are prepared by contacting a mixture of a bisphenol or a 4-isopropenylphenol and a 1-(4-hydroxyphenyl)indanol with a metal halide Lewis acid or an alkanesulfonic acid. High...
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4644085 |
Rooperol and its derivates
The invention relates to a new anti-cancer chemical compound which has been called rooperol and certain derivatives thereof of the general formula ##STR1## in which A is chosen from the group...
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4562298 |
Optically active nordihydroguaiaretic acid and intermediates
A process for producing novel compositions including optically active molecules of nordihydroguaiaretic acid (d,1-2,3-dimethyl,1,4-bis(3,4-dihydroxyphenyl)butane) and intermediates, starting with...
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4427697 |
1,2-Diphenylethane derivatives
The present invention provides 1,2-diphenylethane derivatives of the general formula: ##STR1## wherein X is a hydrogen or halogen atom, R and R', which may be the same or different, are alkyl...
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4371719 |
Curable mixtures based on maleimides and propenyl-substituted phenols, and the use thereof
Curable mixtures of (a) maleimides of the general formula I ##STR1## wherein R is an n-valent aliphatic or aromatic radical, and n is the number 1, 2 or 3; and (b) mono- or polyvalent phenols...
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4343796 |
2,3-Bis-hydroxybenzyl-derivatives
The invention relates to compounds of the formula: ##STR1## in which R 1 and R 2 are the same or different groups selected from hydrogen or acyl or R 1 and R 2 together may represent an...
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4310702 |
Selective monochlorination of ketones and aromatic alcohols
Sulfuryl chloride is reacted in the liquid phase with an organic reactant which is a ketone or aromatic alcohol unsubstituted on both ortho carbons in the presence of a moderator selected from the...
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4291177 |
Process for obtaining halogenated diphenols
Highly pure dihalodiphenols or predetermined, statistical mixtures of unreacted, monohalo- and dihalodiphenols are obtained reacting the diphenol, which is suspended or dissolved in a suitable...
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4243539 |
Antioxidant stabilized lubricant compositions
Lubricant compositions are stabilized against oxidative degradation by incorporating therein a minor effective amount of a reaction product produced from singlet oxygen and a hindered...
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4189610 |
Preparation of 4,4-dioxy-substituted stilbenes
Dehydrohalogenation-rearrangement of 1,1-bis(4-oxy-substituted aryl)-2-haloethanes to yield 4,4'-dioxysubstituted stilbenes is effected by heating an acidic reaction medium comprising the...
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