| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 544359000 |
Additional hetero ring containing
| 133 |
| 544384000 |
Chalcogen bonded directly to piperazine ring carbon
| 18 |
| 544398000 |
Chalcogen attached indirectly to the piperazine ring by nonionic bonding
| 17 |
| 544386000 |
Having -C(=X)-, wherein X is chalcogen, bonded directly to the piperazine ring
| 15 |
| 544392000 |
Phenyl or naphthyl bonded directly to ring nitrogen of the piperazine ring
| 13 |
| 544402000 |
Nitrogen attached indirectly to the piperazine ring by nonionic bonding
| 10 |
| 544403000 |
Carbocyclic ring containing
| 9 |
| 544396000 |
Plural carbocyclic rings bonded directly to the same acyclic carbon
| 6 |
| 544383000 |
Chalcogen attached directly to piperazine ring nitrogen by nonionic bonding | 5 |
| 20090281318 | PROCESS FOR PREPARATION OF SUBSTANTIALLY OPTICALLY PURE LEVOROTATORY AND DEXTROROTATORY ENANTIOMERS OF CETIRIZINE USING NOVEL INTERMEDIATES - The present invention relates to a novel and commercially viable process for substantially optically pure levorotatory and dextrorotatory enantiomers of cetirizine intermediate, 1-[(4-chlorophenyl)phenylmethyl]piperazine, thereby producing substantially optically pure levorotatory and dextrorotatory enantiomers of cetirizine and their pharmaceutical acceptable acid addition salts thereof in high purity and in high yield using novel intermediates. | 11-12-2009 |
| 20130267707 | N,N+hu 1 +l SUBSTITUTED PIPERAZINES HAVING COMBINED ANTIAGGREGANT, ANTICOAGULANT AND VASODILATORY ACTIVITY, AND METHOD FOR PRODUCING SAME - The invention relates to derivatives of N,N′-substituted piperazines of the general formula (I): | 10-10-2013 |
| 20140288304 | FORMATION OF N-PROTECTED BIS-3,6-(4-AMINOBUTYL)-2,5-DIKETOPIPERAZINE THROUGH A CYCLIC ALPHA-N-PROTECTED AMINO ESTER - A method for the synthesis of N-protected 3,6-aminoalkyl-2,5-diketopiperazines is provided. The method includes obtaining a cyclic α-N protected active amino ester and adding it to a mixture of an amine catalyst in an organic solvent. | 09-25-2014 |
| 20150057447 | METHOD OF PRODUCING N-PHENYL-N'-PHENYLSULFONYL PIPERAZINE DERIVATIVE AND INTERMEDIATE THEREOF - Disclosed is a salt and crystal of a 2-(oxazole-2-yl)phenol derivative which are the intermediate in the process of producing a N-phenyl-N′-phenylsulfonyl piperazine derivative. Further disclosed is a method of producing the salt and the crystal of the compound represented by Formula(I): | 02-26-2015 |
| 20160137614 | FORMATION OF N-PROTECTED BIS-3,6- (4-AMINOBUTYL) -2, 5-DIKETOPIPERAZINE THROUGH A CYCLIC ALPHA-N-PROTECTED AMINO ESTER - A method for the synthesis of N-protected 3,6-aminoalkyl-2,5-diketopiperazines is provided. The method includes obtaining a cyclic α-N protected active amino ester and adding it to a mixture of an amine catalyst in an organic solvent. | 05-19-2016 |
| 544382000 |
Nitrogen attached directly to the piperazine ring by nonionic bonding | 1 |
| 20100121064 | NOVEL METHOD FOR PRODUCING TETA BY MEANS OF EDDN - The invention relates to a process for preparing triethylenetetramine (TETA), which, comprises the following steps:
| 05-13-2010 |
| 544380000 |
Polycyclo-carbocyclic ring system having at least three cyclos | 1 |
| 20110245501 | Substituted Tetracycline Compounds as Synergistic Antifungal Agents - The present invention relates to substituted tetracycline compounds and related methods for increasing the antifungal activity of an antifungal agent. The methods include administering to a subject an effective amount of a substituted tetracycline compound in combination with an antifungal agent such that the subject is treated for the fungal associated disorder. | 10-06-2011 |
| Entries |
| Document | Title | Date |
|---|
| 20080249307 | Method for Producing Ethylene Amines - Processes are described comprising: (i) providing a reactant comprising 1,2-dichloroethane; and (ii) reacting the reactant with ammonia to form a reaction product comprising one or more ethylene amines and hydrogen chloride, wherein the reaction is carried out in the presence of an organic, nitrogen- or phosphorus-containing compound which reacts with the hydrogen chloride to form an ionic liquid. | 10-09-2008 |
| 20100113782 | Diacylglycerol Acyltransferase Inhibitors - Provided herein are compounds of the formula (I): | 05-06-2010 |
| 20110003993 | SALT OF (2S, 3S) -3- [ [ (1S) -1- ISOBUTOXYMETHYL-3-METHYLBUTYL] CARBAMYL] OXIRANE-2-CARBOXYLIC ACID - The invention relates to purification of (2S,3S)-3-[[(1S)-1-isobutoxymethyl-3-methylbutyl]carbamoyl]oxirane-2-carboxylic acid [hereinafter, referred to as the carboxylic acid] using the salt of the carboxylic acid with an organic amine selected from the group consisting of piperazine, adamantane amines and others. The invention also relates to providing crystalline sodium salt of the carboxylic acid. The sodium salt is usable as a material for preparing medicaments and improved in storage stability, and has the following characteristics:
| 01-06-2011 |
| 20110105752 | PROCESS FOR THE PREPARATION OF PIPERAZINYL AND DIAZEPANYL BENZAMIDE DERIVATIVES - The present invention is directed to a novel process for the preparation of piperazinyl and diazepanyl benzamide derivatives, useful for the treatment of disorders and conditions mediated by a histamine receptor, preferably the H3 receptor. | 05-05-2011 |
| 20130331573 | Process for Preparing Piperazine - Process for preparing piperazine of the formula I | 12-12-2013 |
| 20130331574 | Process for Preparing Piperazine - Process for preparing piperazine of the formula I | 12-12-2013 |
| 20140371452 | REDUCTIVE AMINATION OF DIETHANOLAMINE AND RESULTING PRODUCT MIXTURE - The invention provides a method for the reductive amination of diethanolamine to form a product composition that includes piperazine (PIP) and aminoethylethanolamine (AEEA). A catalyst with a transitional alumina/second metal oxide support and a mixture of catalytic metals is used for the reaction which results in low levels of non-PIP and non-AEEA side products. | 12-18-2014 |
