- The synthesis of asymmetric ethylenediamine derivatives catalyzed by ion-exchange resins
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The ring-opening reaction of aziridine with alkylamines over a series of ion-exchange resins was investigated. Among these catalysts, D001-CC exhibited excellent catalytic performance. The catalysts were characterized by SEM and N2 adsorption-desorption. The results indicated that the selectivity of N,N-diethylethylenediamine mainly depended on the acidity and S BET of the resins. Strong Br?nsted acid sites played an important role on the conversion of aziridine, and the distribution of acid sites on catalyst had a significant effect on the selectivity of N,N-diethylethylenediamine. The reaction parameters, such as reaction time, molar ratio, reaction temperature, and catalyst loading, were also optimized and N,N-diethylethylenediamine was obtained in an excellent yield of 97 %. Furthermore, D001-CC was efficiently recycled five times by simple treatment with large amounts of deionized water and mineral acid. Finally, a series of asymmetric ethylenediamine derivatives were successfully synthesized with this method. Therefore, a simple and versatile process for the synthesis of asymmetric ethylenediamine derivatives has been established over ion-exchange resins.
- Wang, Wenwen,Wei, Ruisong,Yin, Guohui,Tian, Jun,Duan, Yifan,Chen, Ligong,Li, Yang
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Read Online
- New pyrido[3,4-g]quinazoline derivatives as CLK1 and DYRK1A inhibitors: synthesis, biological evaluation and binding mode analysis
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Cdc2-like kinase 1 (CLK1) and dual specificity tyrosine phosphorylation-regulated kinase 1A (DYRK1A) are involved in the regulation of alternative pre-mRNA splicing. Dysregulation of this process has been linked to cancer progression and neurodegenerative diseases, making CLK1 and DYRK1A important therapeutic targets. Here we describe the synthesis of new pyrido[3,4-g]quinazoline derivatives and the evaluation of the inhibitory potencies of these compounds toward CDK5, CK1, GSK3, CLK1 and DYRK1A. Introduction of aminoalkylamino groups at the 2-position resulted in several compounds with low nanomolar affinity and selective inhibition of CLK1 and/or DYRK1A. Their evaluation on several immortalized or cancerous cell lines showed varying degree of cell viability reduction. Co-crystal structures of CLK1 with two of the most potent compounds revealed two alternative binding modes of the pyrido[3,4-g]quinazoline scaffold that can be exploited for future inhibitor design.
- Tazarki, Helmi,Zeinyeh, Wael,Esvan, Yannick J.,Knapp, Stefan,Chatterjee, Deep,Schr?der, Martin,Joerger, Andreas C.,Khiari, Jameleddine,Josselin, Béatrice,Baratte, Blandine,Bach, Stéphane,Ruchaud, Sandrine,Anizon, Fabrice,Giraud, Francis,Moreau, Pascale
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Read Online
- Preparation method for high-yield N, N-diethylethylenediamine
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The invention discloses a preparation method for high-yield N, N-diethylethylenediamine. The method comprises the following steps that 2-diethylaminoethylchloride hydrochloride and benzyl carbamate are added into a sodium hydroxide solution, a palladium-carbon catalyst is added, heating is carried out so as to reach 55-65 DEG C for reaction for 4-7 hours under a sealed condition, alkali is added into reaction liquid for cooling and alkali precipitation, lower-layer alkali liquor and the palladium-carbon catalyst are separated, an organic layer is subjected to rectification treatment, and a fraction of 142-148 DEG C is collected so as to obtain the N,N-diethylethylenediamine. The method has the advantages that the reaction conditions are mild, no harmful gas is adopted or generated in the reaction process, and meanwhile, the yield of the N,N-diethylethylenediamine is high.
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Paragraph 0020-0037
(2018/12/14)
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- Preparation method of N,N-diethylenediamine
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The invention belongs to the technical field of chemical synthesis and relates to a preparation method of N,N-diethylenediamine. The preparation method of the N,N-diethylenediamine comprises the following steps: (1) preparing 2-diethylamine-based chloroethane hydrochloride: performing heat-preserving reaction on a chlorinating agent and diethylamine ethanol in a reaction solvent, concentrating a reaction solvent after the heat-preserving reaction, adding low molecular alcohol or ester after concentrating, performing recrystallization to obtain a 2-2-diethylamine-based chloroethane hydrochloride wet product and drying to obtain a 2-diethylamine-based chloroethane hydrochloride dry product; (2) preparing the N,N-diethylenediamine: performing heat-preserving and pressure-maintaining reactionon the 2-diethylamine-based chloroethane hydrochloride and excessive liquid ammonia for more than or equal to 4 hours under the conditions that the pressure is 0 to 10 MPa and the temperature is 10 to100 DEG C, recycling the residual ammonia gas after the reaction, adding alkali into the reaction liquid, performing cooling alkali analysis, separating out the lower layer of alkaline liquid, rectifying an organic layer and collecting the fraction with the temperature of 143 to 148 DEG C, to obtain the N,N-diethylenediamine. The N,N-diethylenediamine prepared according to the method provided bythe invention has the advantages of high yield, high content, simplicity in operation, low raw material cost and the like.
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Paragraph 0006; 0031; 0034; 0035
(2018/08/04)
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- Isoflavone amide type derivative, preparation method and medical application thereof
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The invention relates to the field of medicinal chemistry, and relates to an isoflavone amide type derivative, a preparation method and a medical application thereof, in particular to an isoflavone amide type derivative with the general formula (I), a preparation method thereof, medicine compositions including the isoflavone amide type derivative and a medical application thereof, especially an application of the isoflavone amide type derivative as a medicine for preventing or curing hyperlipemia, obesity or type II diabetes. The general formula (I) is shown in the description.
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Paragraph 0016; 0092; 0093; 0094; 0098; 0099; 0100
(2016/10/10)
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- Synthesis and characterization of N-substitutional ethylenediamine derivatives
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N-Substituted and N,N-disubstituted ethylenediamine derivatives were prepared rapidly in aqueous conditions from 30 to 76 % yields, respectively, on a multi-gram scale starting from inexpensive and commercially available starting materials. The steps involved Michael addition, hydrazinolysis and Curtius rearrangements. The highlight of this method lies on its convenience and economy in accessing these intermediates.
- Yao, Ri-Sheng,Jiang, Lai-En,Wu, Sheng-Hua,Deng, Sheng-Song,Yang, Yang
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experimental part
p. 3792 - 3794
(2012/01/05)
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- QUINAZOLINE DERIVATIVES AS A MULTIPLEX INHIBITOR AND METHOD FOR THE PREPARATION THEREOF
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The present invention relates to a novel quinazoline derivative and a pharmaceutically acceptable salt thereof as a multiplex inhibitor, a method for the preparation thereof, and a pharmaceutical composition and a therapeutic composition comprising same as an active ingredient. The inventive quinazoline derivative as a multiplex inhibitor can selectively and effectively inhibit diseases caused by the overactivity of a tyrosine kinase.
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Page/Page column 82
(2008/06/13)
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- METHOD FOR PRODUCING N-MONOALKYL-SUBSTITUTED ALKYLENE AMINE
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PROBLEM TO BE SOLVED: To provide a method for producing an N-monoalkyl-substituted alkylene amine especially useful for uses such as medicine intermediates, agrochemical intermediates, urethane resin-foaming catalysts, surfactants and the like among alkyl-substituted alkylene amine compounds from an alcohol and an alkylene amine as raw materials. SOLUTION: This method for producing the N-monoalkyl-substituted alkylene amine is characterized by reacting the alkylene amine with a ≥2C alkyl alcohol in the presence of a copper-containing oxide catalyst system. The N-monoalkyl-substituted alkylenamine is produced in high conversion and in N-monoalkylation selectivity.
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Page/Page column 6; 8
(2010/02/11)
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- Pharmaceutically active pyrrolidine derivatives as bax inhibitors
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The present invention is related to new substituted pyrrolidine derivatives of formula (I). Said compounds are preferably for use as pharmaceutically active compounds. Specifically, pyrrolidine derivatives of formula (I) are useful in the treatment and/or prevention of neurodegenerative disorders, diseases associated with polygultamine tracts, epilepsy, ischemia, infertility, cardiovascular disorders renal hypoxia, hepatitis and AIDS. Said pyrrolidine derivatives display a modulatory and most notably a down-regulating-up to an inhibitory-activity with respect to the cellular death agonist Bax and/or the activation pathways leading to Bax and allows therefore to block the release of cytochrome (c). The present invention is furthermore related to novel pharmaceutically activity substituted pyrrolidine derivatives as well as to methods of their preparation, wherein X is selected from the group consisting of O, S, CRR, NOR, NNRR; A is selected from the group consisting of —(C═O)—, —(C═O)—O—, —C(═NH)—, —(C═O)—NH—, —(C═S)—NH, —SO2-, —SO2NH—; —CH2-; B is either a group —(C═O)—NRR or represents a heterocyclic residue having the formula (II) wherein Q is NR, O or S; n is an integer selected of 0, 1 or 2; Y, Z and E form together with the 2 carbons to which they are attached a 5-6 membered aryl or heteroaryl ring.
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- Pharmaceutically active pyrrolidine derivatives
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The present invention is related to pyrrolidine derivatives of formula (I). Said compounds are preferably for use as pharmaceutically active compounds. Specifically, pyrrolidine derivatives of formula (I) are useful in the treatment and/or prevention of premature labor, premature birth and dysmenorrhea. In particular, the present invention is related to pyrrolidine derivatives displaying a substantial modulatory, notably an antagonist activity of the oxytocin receptor. More preferably, said compounds are useful in the treatment and/or prevention of disease states mediated by oxytocin, including premature labor, premature birth and dysmenorrhea. The present invention is furthermore related to novel pyrrolidine derivatives as well as to methods of their preparation, wherein X is selected from the group consisting of CR6R7, NOR6, NNR6R7; A is selected from the group consisting of —(C═O)—, —(C═O)—O—, —C(═NH)—, —(C═O)—NH—, —(C═S)—NH, —SO22—, —SO2NH—, —CH2—,B is either a group —(C═O)—NR8R9 or represents a heterocyclic residue having the formula (a) wherein Q is NR10, O or S; n is an integer selected of 0, 1 or 2; Y, Z and E form together with the 2 carbons to which they are attached a 5-6 membered aryl or heteroaryl ring.
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- 2-aminobenzoxazole derivatives and combinatorial libraries thereof
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The present invention relates to novel 2-aminobenzoxazole derivative compounds of the following formula: wherein R1 to R4 and Z have the meanings provided herein. The invention further relates to combinatorial libraries containing two or more such compounds, as well as methods of preparing 2-aminobenzoxazole derivative compounds.
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- 2-aminopyridine derivatives and combinatorial libraries thereof
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The present invention relates to novel 2-aminopyridine derivative compounds of the following formula: wherein R1to R5have the meanings provided herein. The invention further relates to combinatorial libraries containing two or more such compounds, as well as methods of preparing 2-aminopyridine derivative compounds.
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- N,N'-disubstituted and N,N,N'-/N,N', N'-trisubstituted thioureas and method of their preparation (II)
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N,N'-disubstituted or N,N,N'- or N,N',N'-trisubstituted thioureas with additional organyloxysilyl function and tertiary amine function of the general formula STR1 These compounds are prepared as follows: a) Aminoorganylsilanes of the general formula STR2
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- Method of treating cardiac disorders with N-(aryloxyalkyl)-N'-(aminoalkyl)ureas
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N-(Aryloxyalkyl)-N'-(aminoalkyl)ureas and thioureas having the formula: STR1 wherein R1 and R2 are hydrogen, loweralkyl, cycloalkyl, phenyl or phenyllower alkyl, and R3 and R4 are hydrogen, loweralkyl, phenyl and phenylalkyl or R3 and R4 taken together with the adjacent nitrogen form a heterocyclic residue are disclosed in a method of suppressing cardiac arrhythmias.
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- Phthalocyanines
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Storage-stable aqueous compositions containing dissolved water-soluble novel acid addition salts of poly(N-substituted sulfonamido) phthalocyanines which are prepared by the interaction of a single acid or a mixture of acids and poly(N-substituted sulfonamido) phthalocyanines, are useful for direct dyeing, particularly the dyeing of cellulose.
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- Nucleophilic Ring Opening of 2-Oxazolines with Amines: A Convenient Synthesis for Unsymmetrically Substituted Ethylenediamines
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The reaction of 2-alkyl-2-oxazolines with alkyl- and arylamines was investigated.The acid-catalyzed nucleophilic ring opening of the 2-oxazolines yields N-(2-aminoethyl)carboxamides in good to excellent yields with secondary amines and hindered primary amines.The N-(2-aminoethyl)carboxamides were hydrolyzed under acidic or basic conditions to selectively yield unsymmetrically substituted ethylenediamines.
- Fazio, Michael J.
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p. 4889 - 4893
(2007/10/02)
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- Anodic Oxidation of Amines. VIII. Oxidation of Ethane-1,2-diamines
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Anodic oxidation of ethylenediamines (ethane-1,2-diamines) was investigated by cyclic voltammetry and controlled potential electrolysis in aqueous carbonate buffer (pH 10) at a glassy-carbon electrode.The first wave of the diamines is developed at a lower potential than that of the corresponding β-alkanolamines.Among the oxidative bond cleavages, the relative amount of (α)C-(β)C bond fission is larger than that observed for β-alkanolamines and oxidative deamination is only observed after the (α)C-(β)C bond fission.A scheme for the reaction processes is proposed.Keywords: ethane-1,2-diamine; anodic oxidation; (α)C-(β)C bond fission; C-N bond fission; carbonate buffer; glassy-carbon electrode.
- Masui, Masaichiro,Kamada, Yoshiyuki,Nishida, Hideko,Ozaki, Shigeko
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p. 940 - 944
(2007/10/02)
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- Novel monoazo and disazo colorants
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This invention relates to novel (N-substituted sulfonamido) monoazo and disazo compounds, to acid-addition salts of said azo compounds which are useful as direct dyes particularly in the dyeing of cellulose, to novel (N-substituted sulfonamido) substituted nitrobenzene, aniline and acetanilide intermediates to said azo compounds and to methods of preparation of said azo compounds and said intermediates to said azo compounds.
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- N-Aminoalkylenesulfonamido substituted monoazo colorants
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This invention relates to novel mixtures consisting essentially of monoazo compounds and disazo compounds which are substituted with x (N-substituted sulfonamido) groups, to acid-addition salts of said azo compounds, useful as direct dyes particularly in the dyeing of cellulose, and to methods of preparation of said mixtures of (N-substituted sulfonamido) substituted monoazo and disazo compounds.
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- Novel compositions and processes
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Storage-stable aqueous compositions containing dissolved water-soluble novel acid addition salts of poly(N-substituted sulfonamido) phthalocyanines which are prepared by the interaction of a single acid or a mixture of acids and poly(N-substituted sulfonamido) phthalocyanines, are useful for direct dyeing, particularly the dyeing of cellulose.
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- INTRAMOLECULAR GENERAL-BASE CATALYSIS OF SCHIFF-BASED HYDROLYSIS BY TERTIARY AMINO GROUPS.
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Hydrolysis of a series of Schiff bases derived from benzophenone and various amines has been studied kineticlly in aqueous solution. A linear correlation of the log of the rate constants for the water reaction with the Schiff base pK//a (slope minus 0. 70) shows large positive deviations for Schiff bases derived from (2-aminoethyl)diethylamine, N-(2-aminoethyl)morpholine, N-(2-aminoethyl)piperazine and 2-(aminomethyl)pyridine (1i) but small deviations for Schiff bases from N-(3-aminopropyl)morpholine and 2-(2-aminoethyl)pyridine. The deviations found are attributed to intramolecular general-base catalysis of the water reaction by the internal tertiary amino groups. Magnitudes of the rate enhancement are correlated well with pK//a//l of the internal catalyst ( beta equals 0. 49). Effective concentrations of the internal bases are estimated to range from 340 (1e) to 40 M.
- Okuyama,Shibuya,Fueno
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p. 730 - 736
(2007/10/02)
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- Long-range anisotropic effects of long chain amides
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In 1H-NMR spectra of amids with long-chain aliphatic N-substituents one observes - despite of the free mobility of the aliphatic chain - splitting of the signals of the terminal methyl groups which is caused by the hindered rotation of the amide bond. - Keywords: Amides; Hindered rotation; 1H-NMR
- Budzikiewicz, Herbert,Vieth, Peter-Eric,Krueger, Uwe
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p. 825 - 840
(2007/10/02)
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- 2'-(4,6-Disubstituted)-s-triazin-2-yl)amino-6'-dialkylamino flurans
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Fluorans useful as color precursors, particularly in the art of carbonless duplicating are normally colorless and are represented by the structural formula STR1 wherein R represents non-tertiary alkyl of one to four carbon atoms; R1 and R2 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R3 and R4 represent chlorine, NH2 or one of the groups --NR5 -(lower-alkylene)-N(R6)(R7), --NR5 -(lower-alkylene-N(R8)(R9)(R10) An, -NR5 -(lower-alkylene)-OH, -NR5 -(lower-alkylene) STR2 --NR5 -(HSO3 -C6 H4) or --O-(lower-alkylene)-N(R8)(R9) in which R5, R6 and R7 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R8 and R9 represent non-tertiary alkyl of one to four carbon atoms; R10 represents non-tertiary alkyl of one to four carbon atoms, benzyl or benzyl substituted in the benzene ring by one or two of halo or alkyl of one to three carbon atoms; and An represents an anion.
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- Triazinyl-benzofluorans
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Fluorans useful as color precursors, particularly in the art of carbonless duplicating are normally colorless and are represented by the structural formula STR1 wherein R represents non-tertiary alkyl of one to four carbon atoms; R1 and R2 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R3 and R4 represent chlorine, or one of the groups --NR5 -(lower-alkylene)-N(R6)(R7) or --NR5 -(lower-alkylene-N+ (R8)(R9)(R10) An- , in which R5, R6 and R7 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R8 and R9 represent non-tertiary alkyl of one to four carbon atoms, R10 represents non-tertiary alkyl of one to four carbon atoms, benzyl or benzyl substituted in the benzene ring by one or two of halo or alkyl of one to three carbon atoms; and An represents an anion.
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- Triazinyl-benzofluorans
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Fluorans useful as color precursors, particularly in the art of carbonless duplicating are normally colorless and are represented by the structural formula STR1 wherein R represents non-tertiary alkyl of one to four carbon atoms; R1 represents hydrogen or non-tertiary alkyl of one to four carbon atoms; R2 and R3 represent chlorine or one of the groups --NR4 --(lower-alkylene)--N(R5)(R6) or --NR4 --(lower-alkylene)--N+(R7)(R8)(R9)An- In which R4, R5 and R6 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R7 and R8 represent non-tertiary alkyl of one to four carbon atoms; R9 represents non-tertiary alkyl of one to four carbon atoms, benzyl or benzyl substituted in the benzene ring by one or two of halo or alkyl of one to three carbon atoms; and An represents an anion.
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