7483-59-2Relevant academic research and scientific papers
METHOD FOR PRODUCING BICYCLIC AMINES
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Paragraph 0058, (2018/06/12)
PROBLEM TO BE SOLVED: To provide a method for producing bicyclic amines with improved yield thereof. SOLUTION: Provided is a method for producing bicyclic amine compounds represented by formula (1), which are hydroxyalkyltriethylenediamines, by subjecting a raw material composition to intramolecular dehydration in vapor phase in the presence of a solid catalyst, where a mixture of N-dihydroxypropylpiperazines and N,N'-bis(dihydroxypropyl)piperazines is used as the raw material composition and an inorganic oxide represented by formula (4) is used as the solid catalyst [R1 to R8 are each independently H, a C1-4 alkyl group, a hydroxy group, a hydroxymethyl group, or a C1-4 alkoxy group]. AlaMbPcOd (4) [M is an alkali metal or an alkaline earth metal; P is phosphorus; 0.001≤b/a≤0.5 (molar ratio); 0.01≤c/a≤0.5 (molar ratio); and d is a number which depends on the bonding states of respective atoms]. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
METHOD FOR PRODUCING HYDROXYALKYLTRIETHYLENEDIAMINE HAVING IMPROVED HUE
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Paragraph 0046; 0047, (2017/12/12)
PROBLEM TO BE SOLVED: To provide a production method which makes it possible to improve the hue of a cyclic alkanolamine such as a hydroxyalkyltriethylenediamine and efficiently obtain a high-purity bicyclic compound. SOLUTION: A method for producing the bicyclic diamine includes bringing a crude hydroxyalkyltriethylenediamine reaction liquid comprising a hydroxyalkyltriethylenediamine represented by formula (1) into contact with oxygen at 110-170°C and then distilling and purifying it (R1-R10 independently represent H, a C1-4 alkyl group or a C1-4 hydroxyalkyl group). SELECTED DRAWING: None COPYRIGHT: (C)2017,JPOandINPIT
N - alkylpiperazine purification of
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Paragraph 0055, (2017/02/28)
PROBLEM TO BE SOLVED: To provide a purification method of N-alkyl piperazines, capable of providing high purity N-alkyl piperazines with low cost and having a high recovery rate.SOLUTION: A mixture of N-alkyl piperazines and a piperazine is distilled in the presence of a polar organic solvent having a higher boiling point than that of the piperazine.
The method of manufacturing the amine compound Bicylic
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Paragraph 0055; 0056, (2017/04/19)
PROBLEM TO BE SOLVED: To provide a method for simply obtaining a bicyclic amine compound at high yield and for suppressing by-product tar contents that may obstruct the continuous production. SOLUTION: The compound indicated by a formula (1) is subjected to intramolecular dehydration in a gas phase under the presence of a solid catalyst to produce the bicyclic amine compound indicated by a formula (2). In the formula (1), R1-R8each independently represents a hydrogen atom, a 1-4C alkyl group, a hydroxy group, a hydroxymethyl group or a 1-4C alkoxy group; X represents a carbon atom or a nitrogen atom; and Y represents a hydrogen atom, an alkyl group, a hydroxy group or a 1-4C hydroxyalkyl group. In the formula (2), R1-R8, X and Y are defined in the same manner as above. COPYRIGHT: (C)2012,JPOandINPIT
Method for producing N-alkylpiperazine
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Paragraph 0058; 0063, (2017/02/09)
PROBLEM TO BE SOLVED: To provide a method for producing N-alkyl piperazines in high yield by selectively alkylating one amino group.SOLUTION: In the method for producing N-alkyl piperazines, piperazines represented by general formula (1) are reacted with a specific alkylating agent in the presence of an acid. In the formula: R-Rare each independently a hydrogen atom, a methyl group, an ethyl group, a 3-8C linear alkyl group or the like, a hydroxyethyl group, a hydroxypropyl group, a dihydroxypropyl group, a methoxy group, an ethoxy group, a phenyl group, a benzyl group, a 2-phenylethyl group, or the like.
METHOD FOR PRODUCING N-MONOSUBSTITUTED PIPERAZINE
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Paragraph 0067; 0078, (2017/04/20)
PROBLEM TO BE SOLVED: To provide a method for producing N-monosubstituted piperazine selectively with high productivity and high yields. SOLUTION: An electrophilic reagent and an alkali source are added to a solution comprising piperazine, which has been heated at 70-90°C, to make a reaction occur therebetween, so that an addition ratio of the electrophilic reagent to the piperazine is 0.2-0.7 mole and an addition amount rate of the electrophilic reagent exceeds an addition amount rate of the alkali source. SELECTED DRAWING: None COPYRIGHT: (C)2017,JPOandINPIT
METHOD FOR PRODUCING BICYCLIC AMINE COMPOUND
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Paragraph 0070, (2016/12/26)
PROBLEM TO BE SOLVED: To provide a method for producing a bicyclic amine compound, in which the bicyclic amine compound, that is useful for pharmaceutical/agrochemical intermediates, catalysts for organic synthesis, chemical adsorbents, antibacterial agents or the like, is produced industrially, continuously and stably. SOLUTION: The method for producing the bicyclic amine compound shown by formula (2) (in which R1 to R10 are each H, a 1-4C alkyl group, a 1-4C hydroxyalkyl group or a hydroxyl group independently; any one of R9 and R10 is a 1-4C hydroxyalkyl group; X is C or C) by an intramolecular dehydration reaction of piperazine, the para position hydrogen of which is replaced by a 1-4C hydroxyalkyl group, or a piperidine derivative in the presence of a solid catalyst in a gas phase. When the intramolecular dehydration reaction is performed, a liquid raw material is used, which material contains a cyclic amine compound having a dihydroxyalkyl group and has 3 mg-O2/L dissolved oxygen concentration. COPYRIGHT: (C)2015,JPO&INPIT
METHOD OF PRODUCING BICYCLIC AMINE COMPOUND
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Paragraph 0058, (2018/02/27)
PROBLEM TO BE SOLVED: To provide a method of efficiently producing a bicyclic amine compound while improving a color tone of it. SOLUTION: A method of producing a bicyclic amine compound includes a reaction step in which the formula (1) is made to react in a gas phase in the presence of a solid catalyst such as an inorganic oxide and a metal phosphoric acid, to produce a bicyclic amine compound of the formula (2), and a distillation step. COPYRIGHT: (C)2015,JPOandINPIT
NOVEL CYCLIC AMINE COMPOUND, AND PROCESS FOR PRODUCING POLYURETHANE RESIN USING SAME
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Paragraph 0120; 0121, (2013/11/19)
To provide a novel cyclic amine compound and a process for producing a polyurethane resin by using it. A3-hydroxy-1,5-diazabicyclo[3.2.2]nonane represented by the following formula (1), and a process for producing a polyurethane resin by using a catalyst for producing a polyurethane resin, which contains the 3-hydroxy-1,5-diazabicyclo[3.2.2]nonane. When the compound represented by the formula (1) has optical isomers, diastereomers or geometric isomers, the compound includes both a mixture of any of them and an isolated isomer of any of them. [in the above formula (1), each of R1, R2, R3, R4, R5, R6, R7 and R8 which are independent of one another, is a hydrogen atom, a C1-4 alkyl group, a hydroxy group, a hydroxymethyl group or a C1-4 alkoxy group.]
PROCESS FOR PRODUCING HYDROXYALKYLTRIETHYLENEDIAMINE COMPOUND, AND CATALYST COMPOSITION FOR THE PRODUCTION OF POLYURETHANE RESIN USING THE HYDROXYALKYLTRIETHYLENEDIAMINE COMPOUND
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Page/Page column 26, (2011/04/18)
To provide a process for producing a hydroxyalkyltriethylenediamine or hydroxytriethylenediamine simply and in a small number of steps without requiring multistage reaction steps; a novel catalyst composition whereby a polyurethane product can be obtained with good productivity and good moldability without bringing about odor problems or environmental problems; and a process for producing a polyurethane resin using the catalyst composition. For example, a hydroxyalkyltriethylenediamine or hydroxytriethylenediamine is produced by subjecting a mono-substituted dihydroxyalkylpiperazine and/or a di-substituted hydroxyalkylpiperazine to an intramolecular dehydration condensation reaction in the presence of an acid catalyst. Further, for example, a polyurethane resin is produced by using a catalyst composition which comprises a hydroxyalkyltriethylenediamine or hydroxytriethylenediamine (A), and an amine compound (B) having, in its molecule, one or more substituents selected from the group consisting of a hydroxy group, a primary amino group and a secondary amino group, or a tertiary amine compound (C) having a value of [blowing reaction rate constant/gelling reaction rate constant] of at least 0.5.
