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7906682 |
Synthesis of soluble functionalized lithium initiators
This invention discloses a process for making dilithium initiators in high purity. This process can be conducted in the absence of amines which is desirable since amines can act as modifiers for...
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7671237 |
Synthesis of soluble functionalized lithium initiators
This invention discloses a process for making dilithium initiators in high purity. This process can be conducted in the absence of amines which is desirable since amines can act as modifiers for...
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6156902 |
Bis-o-amino (thio) phenols, and their preparation
The invention relates to novel bis-o-aminophenols, and bis-o-aminothiophenols of the following structure: ##STR1## where A1 to A3 are--independently of one another--H, CH3, OCH3, CH2 CH3, or OCH2...
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6011178 |
Process for the preparation of 2-amino-4,5,3',4'-tetramethoxybenzophenone
2-Amino-4,5,3',4'-tetramethoxybenzophenone of the formula: ##STR1## is prepared by mononitration of 3,3',4,4'-tetramethyoxybenzophenone using nitric acid in the presence of acetic acid, and...
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5986136 |
Photolabeling reagent
Disclosed is a compound represent by the following structural formula: ##STR1## X is --H or an amine protecting group; --OY is --OH, an activating group for a carboxylic acid or a protecting group...
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5599993 |
Phenylethynyl amine
Four phenylethynyl amine compounds--3 and 4-aminophenoxy-4'-phenylethynylbenzophenone, and 3 and 4-amino-4'-phenylethynylbenzophenone--were readily prepared and were used to endcap imide oligomers....
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5322962 |
Aromatic diamine intermediates useful in the preparation of polyimide
Disclosed are a novel aromatic diamine; a polymide comprising 1,3-bis(3-aminobenzoyl)benzene or 4,4'-bis(3-aminobenzoyl)biphenyl as a diamine component and having recurring structural units...
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5107029 |
Process for preparing diketones and keto-acids
This invention concerns a process for preparing diketones and keto-acids by reacting a dicarboxylic acid and an aromatic compound in the presence of an alkylsulfonic acid such as methanesulfonic...
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5077436 |
Bis(3-aminophenoxy) aromatics and method of preparing the same
Bis(3-nitrophenoxy) derivatives of aromatic or bridged aromatic hydrocarbons are derived from m-dinitrobenzene and dihydroxy derivatives of said hydrocarbons and certain substituted derivatives...
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4825001 |
Cyclobutarene ketoaniline monomeric and polymeric compositions
The invention comprises cyclobutarene ketoaniline monomers and the process for preparing them. The monomers can be used to graft and/or endcap a monomer or polymer having at least 1 amino-reactive...
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4670600 |
Preparation of substituted amines
Amines are substituted, e.g. alkylated, by reacting the unsubstituted amine with a ketone or aldehyde, a borohydride and a rigid acid.
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4618714 |
Process for preparation of 3,3'- or 3,4'-diaminobenzophenones
Preparation of 3,3'- or 3,4'-diaminobenzophenone by nitrating a chloronitrobenzophenone mixture obtained by the Friedel-Crafts reaction between 3- or 4-nitrobenzoyl chloride and chlorobenzene, and...
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4568695 |
2-Amino-3-benzoyl-phenethylalcohols and intermediates therefor
Novel 2-amino-3-benzoylphenethylalcohols are provided having the formula: ##STR1## wherein; X is hydrogen, loweralkyl, loweralkoxy, halogen or trifluoromethyl, and Y is hydrogen, loweralkyl,...
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4560721 |
Process for preparing an ether solution of polyamic acids and polyimide resins
A novel ether solution of dinitrobenzophenone and a process for preparing an ether solution of diaminobenzophenone therefrom which comprises subjecting a dinitrobenzophenone dissolved in said ether...
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4556738 |
Process for preparation of 3,3'- or 3,4'-diamino benzophenone
3,3'- or 3,4'-diamino benzophenone is prepared by catalytically reducing and dehalogenating, in the presence of a reduction catalyst and a dehydrohalogenation agent, a benzophenone compound or...
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4550208 |
Preparation of 4,4'-diaminobenzophenones
4,4'-diaminobenzophenones of the formula I ##STR1## where the rings A and B can be further substituted, are prepared by a process in which a compound of the formula II ##STR2## where the rings A, B...
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4544755 |
Cleavage of phthalimides to amines
Phthalimides of the formula I ##STR1## where R is a substituent and the ring A can be further substituted, are cleaved by a process in which a compound of the formula I is treated with an...
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4540818 |
Process for preparation of 3,3'- or 3,4'-diaminodiphenylmethane
Preparation of 3,3'- or 3,4'-diaminodiphenylmethane by catalytically reducing and dechlorinating, in the presence of a reduction catalyst, a dinitrobenzophenone compound having the formula ##STR1##...
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4453012 |
Process for the preparation of phenyl ketones
A process for the preparation of phenyl ketones, characterized in that, in a first stage, a halo- or trihalomethylbenzene is reacted with a trihalomethylated aliphatic or aromatic compound in the...
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4446078 |
Process for the preparation of α,α-difluoroalkyl-thiophenyl ketones
A process for the preparation of α,α-difluoroalkoxy or α,α-difluoroalkylthiophenyl ketones, in which a polyhaloalkoxybenzene or a polyhaloalkylthiobenzene is reacted with a carboxylic acid, a pre...
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4438043 |
Process for preparation of di- or trifluoromethoxyphenyl ketones or di- or trifluoromethylthiophenyl ketones
A process for the preparation of di- or trifluoromethoxyphenyl ketones or di- or trifluoromethylthiophenyl ketones, characterized in that, in a first stage, a di- or trihalomethoxybenzene or a di-...
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4297513 |
Process for the preparation of benzophenone thioethers
Benzophenone thioethers of the general formula I or Ia ##STR1## in which X is hydrogen, alkyl, alkoxy or --COO-alkyl and X1 is hydrogen, Cl, Br or --SR, R is an unbranched or branched alkyl radical...
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4215226 |
Selective hydrogenation of nitroaromatic acetylenes over an unsupported RuS2 catalyst
Aromatic nitroacetylene compounds wherein both the nitro and acetylene groups are directly connected to aromatic ring carbon atoms are hydrogenated in dilute concentration in an inert solvent at...
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4186151 |
Process for preparing a 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone)
A novel process is provided for preparing 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone), comprising forming a novel 2-hydroxy-4-alkoxy-5-aminomethylbenzophenone by a reaction of a...
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4160784 |
Process for the production of o-aminophenyl ketone derivatives
O-Aminophenyl ketone derivatives are regio-specifically prepared by reacting an aniline unsubstituted in at least one ortho position with a nitrile in the presence of boron trihalogenide to...
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4096144 |
Process for preparing quinazolinone derivatives and their 2-(N-mono-substituted amino)-phenyl ketone intermediate derivatives
1,4-Substituted-2(1H)-quinazolinone derivatives are prepared by contactng a 2-aminophenyl ketone derivative with an alkaline agent such as alkali metal, alkali metal hydride, alkali metal amide,...
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4083871 |
Preparation of 2-sec.-alkylaminobenzophenones
2-Sec.-alkylaminobenzophenones are prepared by reacting a corresponding 2-aminobenzophenone with a ketone, a borohydride and carboxylic acid.
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4082749 |
Process for the production of amines
Amines and substituted ureas are produced by reaction of carboxamides with hypochlorites in the presence of bromine, iodine, polymerization inhibitors, and/or haloamides and excess alkali metal...
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4071557 |
Preparation of 2-substituted aminophenyl ketones
Substituted aminophenyl ketones such as 2-alkylaminobenzophenones are prepared by reacting a corresponding 2-aminophenyl ketone with a ketone or aldehyde, a borohydride and strong acid.
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4029704 |
Oximes
O-Hydroxyphenyl benzyl ketoximes, preferably containing as substituents one or more alkyl or alkoxy groups containing a total of from 3 to 25 carbon atoms, are used to extract metals from aqueous...
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3988300 |
Benzophenone ureas and method for utilizing the same
This invention provides for novel benzophenone ureas, a method for preparing the same, and a method for controlling undesirable broadleaf weeds and grasses therewith, wherein said benzophenone is...
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3985783 |
Process for ring acylation of phenols
Mono- and poly-phenols and derivatives thereof are ring acylated by a Friedel-Crafts acylation reaction in which the hydroxy groups are protected by prior silylation.
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3917702 |
Method for making liquid resinous curing agents for epoxy resins and the products thereof
A curing agent for epoxy resins is made by processing an aromatic polyamine with an active aldehyde compound under reaction conditions and proportions of ingredients which yield curing agents which...
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3900501 |
Benzophenone intermediates for 7-lower alkanoyl benzodiazepines
The present invention relates to processes for the preparation of 7-lower alkanoyl-1,4-benzodiazepin-2-ones from the corresponding 7-(cyclic ketal) or 7-(aliphatic ketal)-1,4-benzodiazepin-2-ones....
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3867453 |
Production of ketone by reaction of ester or thiol ester with grignard reagent
Ketones are produced by the reaction of an ester or a thiol ester with a Grignard reagent, optionally in an inert solvent at a temperature of preferably from -78° to +60°C.
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3723432 |
1-SUBSTITUTED-4-ARYL-2(1H)-QUINAZOLINONES AND THEIR PREPARATION
Compounds are of the class of 1-substituted-4-aryl-2(1H)-quinazolinones, e.g., 1-ethyl-4-phenyl-2(1H)-quinazolinone, which are useful as anti-inflammatory agents, antipyretics and analgesics. The...
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3678036 |
2-SUBSTITUTED AMINO-1,4-BENZODIAZEPINE
1,4-Benzodiazepines bearing in position-2, either a disubstituted amino group or an group wherein R is lower alkylene and R6 and R7 are either lower alkyl or together with the nitrogen atom form a...
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3551497 |
CATALYSIS OF THE EXCHANGE REACTION BETWEEN SECONDARY ALCOHOLS AND KETONES
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3549635 |
PREPARATION OF SUBSTITUTED-2(1H)-QUINAZOLINONES
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3541151 |
PREPARATION OF TERTIARY-BUTYLAMINO-BENZOPHENONES
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3523939 |
5-(2,6-DISUBSTITUTED PHENYL)-1,4-BENZODIAZEPINES AND METHODS FOR THEIR PREPARATION
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3510517 |
2-DIMETHYLAMINO-5-CHLORO-BENZHYDROLS
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3497543 |
S-LOWERALKYL SUBSTITUTED BENZHYDRYLTHIOLCARBONATES
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3642897 |
PREPARATION OF 2-ALKYLAMINOBENZOPHENONES
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3790584 |
SULFAMYLBENZOIC ACIDS
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3553332 |
ANTI-TUBERCULAR BENZOPHENONE DERIVATIVES
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3657267 |
BENZIMIDAZOLE CARBAMATES
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3701782 |
1-CARBOLOWER ALKOXY - 6 - PHENYL-4H-S-TRIAZOLO(1,4)BENZODIAZEPINE COMPOUNDS
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3586709 |
2-DIALKYLAMINOBENZHYDRYL ESTERS OF AROMATIC ACIDS
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3660430 |
2-SUBSTITUTED-3-ARYLINDOLES
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