- Biological evaluation of tetracationic compounds based on two 1,4-diazabicyclo[2.2.2]octane moieties connected by different linkers
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A series of 1,4-diazabicyclo[2.2.2]octane derivatives differing by linker moiety was evaluated for activity against several strains of both Gram-positive and Gram-negative bacteria including drug-resistant strains, one strain of fungus and influenza virus A/Puerto Rico/8/34 (H1N1). All compounds exhibited high antibacterial activity against all bacteria except Proteus vulgaris. The minimum inhibitory concentrations (MICs) of compound 1c with an o-phenylenebismethyl linker and compound 1e with a propylene aliphatic linker were found to be low and were comparable or better to the reference drug ciprofloxacin for Pseudomonas aeruginosa and Staphylococcus aureus. Additionally, a time-kill assay was performed to examine the bactericidal kinetics. Compounds 1c and 1e displayed rapid killing effects against St. aureus and Ps. aeruginosa after 2?h. Furthermore, compounds 1a–c with aromatic linkers and compound 1e showed the highest antiviral activity.
- Burakova, Ekaterina A.,Saranina, Irina V.,Tikunova, Nina V.,Nazarkina, Zhanna K.,Laktionov, Pavel P.,Karpinskaya, Lubov’ A.,Anikin, Vadim B.,Zarubaev, Vladimir V.,Silnikov, Vladimir N.
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- Synthesis of 1,2-Bis(1,4,7,10-tetra-azadodecanyl)ethane, a Double-ring Fully Saturated Macrocycle containing 12-Membered Tetra-aza Subunits
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The title compound, a fully saturated bimacrocycle (1), has been obtained through a procedure involving the protection of all but one of the amino nitrogen atoms of each tetra-aza ring which are then bridged by an ethylenic segment; (1) behaves as a dinucleating ligand, forming a dicopper(II) complex in which there is a weak ferromagnetic interaction between the metal atoms.
- Ciampolini, Mario,Micheloni, Mauro,Nardi, Nicoletta,Vizza, Francesco,Buttafava, Armando,et al.
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- Kinetics of phosphoramide mustard hydrolysis in aqueous solution
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Hydrolysis of phosphoramide mustard was investigated using HPLC, 31P NMR, and GC-MS with specific deuterium labels. The hydrolysis of phosphoramide mustard in sodium phosphate buffers was found to follow apparent first-order kinetics. The rate of hydrolysis was temperature and pH dependent, being slower under acidic conditions. The hydrolysis was not catalyzed by hydroxyl ion, and its pH dependence appeared to be the result of a change in the mechanism of hydrolysis at different pH values. At a pH value approximately above the pK(a) of the phosphoramide mustard nitrogen, the major hydrolytic pathway of phosphoramide mustard was via the formation of the aziridinium ion, followed by nucleophilic attack. At pH values below its pK(a), cleavage of the P-N bond predominated. At pH 7.4, the formation of an aziridinium ion was followed by a rapid hydrolysis to yield the monohydroxy and, subsequently, the dihydroxy products. The hydrolysis at this pH was adequately described by consecutive first-order kinetics. Seven species in the hydrolytic mixture have been identified as intact phosphoramide mustard, N-(2-chloroethyl)-N-(2-hydroxyethyl)phosphorodiamidic acid, N,N-bis-(2-hydroxyethyl)phosphorodiamidic acid, phosphoramidic acid, phosphoric acid, N,N-bis-(2-chlorethyl)amine, and N-(2-chloroethyl)-N-(2-hydroxyethyl)amine by GC-MS with the aid of deuterium labels. Phosphoramide mustard was found to be stabilized by chloride ion. The stabilization was linearly related to the chloride ion concentration, and the mechanism was found to be via the formation of phosphoramide mustard from the aziridinium and chloride ions. Phosphoramide mustard was significantly more stable in human plasma and in 5% human serum albumin as compared to aqueous buffers, an observation that may be important in vivo.
- Watson,Dea,Chan
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- Novel antitumor agent family of 1H-benzo[c,d]indol-2-one with flexible basic side chains: Synthesis and biological evaluation
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A series of mono-1H-benzo[c,d]indol-2-one with different amine side chains and bis-1H-benzo[c,d]indol-2-one as novel family of DNA intercalators were designed and synthesized, the contributions of aromatic chromophores and amine side chains for DNA binding properties, for example, intercalation and electrostatic binding, respectively, were evaluated. Among them, A3 tailed with N,N-dimethylamino-ethyl-ethane-1,2-diamine showed selective anti-tumor activities against cell lines A549 and P388 with IC50 0.428 μm and 1.69 μm.
- Yin, Hong,Xu, Yufang,Qian, Xuhong
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- Synthetic method N-Boc piperazine
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The invention discloses a synthetic method of N-Boc piperazine. According to the method, diethylamine alcohol is taken as a starting material, and three steps of chlorination, Boc protection and aminolysis cyclization are carried out to synthesize N-Boc piperazine. The method is readily available in raw materials, mild in reaction conditions, low in product cost, high in yield, high in purity andsuitable for industrial production.
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Paragraph 0021; 0029; 0030; 0033; 0034; 0037; 0038
(2020/03/19)
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- Synthesis of novel perfluoroalkyl ether derivatives
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A series of novel fluoroether-containing monomers has been designed and prepared based on the commercially available perfluoroalkyl ether acid fluoride. Treating acid fluoride with allyl alcohol, 2-hydroxyethyl methacrylate or N-allylmethylamine allowed for the direct formation of corresponding vinyl-containing fluorinated monomers. High yields of the fluorinated epoxy monomers could be obtained from acid chloride with glycidol; meanwhile, fluorinated diol was prepared from diethanolamine or 3-amino-1,2-propanediol. Moreover, fluorinated monoamine, fluorinated monoalcohol and fluorinated dichloride were also obtained. Most of these fluorinated monomers were liquid at room temperature and exhibited good solubility in common organic solvents.
- Shi, Xiang,Shi, Hongxin,Wu, Hongke,Shen, HaiMin
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p. 5091 - 5105
(2018/04/05)
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- Synthesis, cytotoxicity, topoisomerase I inhibition and molecular docking of novel phosphoramide mustard sophoridinic acid analogues
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A series of novel phosphoramide mustard sophoridinic acid analogues, consisting of nitrogen mustard group and sophoridinic acid scaffold, have been designed, synthesized and evaluated for their topoisomerase inhibitory activity as well as cytotoxicity against six tumor cell lines (SMMC-7721, LoVo, MCF-7, K562, S180 and H22) and a normal cell line (L929). Among the compounds tested, five were found to be potent inhibitors and exhibited potent cytotoxicity against S180 and H22 cell lines with IC50 values of 1–4?μM. Further mechanistic studies showed that this class of compounds acted as novel topoisomerase I (Topo I) catalytic inhibitors by preventing the binding of Topo I to DNA and inhibiting the cleavage of DNA, and molecular docking studies revealed that the binding energy for these compounds was comparable to that for classic Topo I inhibitors CPT and HCPT, indicating that the compounds have an interaction with DNA and Topo I.
- Liu, Kai,Li, Dong-Dong,Zhao, Xiu-Mei,Dai, Lin-Lin,Zhang, Ting,Tao, Zun-Wei
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- The preparation of 8-[4-[4-(2-pyrimidinyl)-1-piperaziny]butyl]-8- azaspiro[4,5] decane-7,9-dione hydrochloride
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8-[4-[4-(2-Pyrimidinyl)-1-piperaziny]butyl]-8-azaspiro [4,5] decane-7,9-dione hydrochloride (buspirone hydrochloride) was obtained in one pot with a 51.8% overall yield. The key intermediate, 1-(2-pyrimidinyl) piperazine, was synthesized through chlorination and cyclization condensation reaction with diethanolamine as initial material. This modified protocol has the notable advantages of mild reaction condition, convenient operation, and high overall yield.
- Luo, Hu,Xia, Wei,Qian, Chao,Chen, Xinzhi,He, Chaohong
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experimental part
p. 1041 - 1045
(2012/05/05)
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- Process for making n-(diphenylmethyl)piperazines
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The compound of formula (8), in racemic or single enantiomeric form, is useful in making N-(diphenylmethyl)-piperazines such as cetirizine and levocetrizine. wherein Z is preferably phenyl.
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Page/Page column 5
(2009/06/27)
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- Process for making chiral 1,4-disubstituted piperazines
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A process for a stereoselective preparation of novel chiral nitrogen mustard derivatives useful in synthesizing optically active 1,4-disubstituted piperazines of formula: wherein R, Ar, and Q are defined as set forth herein, and intermediate compounds therefor. The 1,4-disubstituted piperazines act as 5HT1A receptor binding agents useful in the treatment of Central Nervous System (CNS) disorders.
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Page/Page column 5-6
(2008/06/13)
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- Bile acid derivatives and production thereof
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A bile acid derivative having carcinostatic activity represented by the following formula (1): STR1 wherein each of R1 and R2 is a hydrogen atom or a hydroxyl group, R3 is a hydroxyl group, benzyloxyl group or --NH--CH2n R5 (wherein R5 is a carboxyl group or sulfonyl group, and n represents the integer of 1 or 2), X is a halogen atom, R4 is a hydrogen atom or XCH2 CH2 --,χ is an α-bond, and χ is an α- or β-bond is produced by the steps (a) and (b), the steps (a), (b) and (c), or the steps (a), (b), (c) and (d) described below: (a) causing an active carbonation reagent to react with a bile acid derivative wherein the carboxyl group is esterified; (b) causing an aminoalkylhalide to react with the active carbonated product obtained; (c) subjecting the bile acid derivative obtained in the above steps (a) and (b) to hydrolysis; and (d) causing the above hydrolyzate to react with an aminoalkyl derivative in the presence of a condensing agent.
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- Prodrug compounds, process for the preparation thereof and sustained release preparation comprising the same
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The invention relates to a novel prodrug compound useful in the treatment of tumors, of the formula: wherein A is a residue of an antitumor substance having >NH or --NH2 group in the molecule, R is a residue of cholesterol, m is an integer of 1 or 2 and n is 0 or 1, and its salts.
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- SYNTHESIS AND SPONTANEOUS DECOMPOSITION OF THE N-OXIDES OF DI(2-CHLOROALKYL)AMINOPHENYLALKANOIC ACIDS
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A convenient method was developed for the production of the N-oxides of di(2-chloroethyl)aminophenylalkanoic acids.In an acidic medium the main products from their spontaneous decomposition are the corresponding di(2-chloroalkyl)aminophenylalkanoic acids, while in an alkaline medium they are 2-chloroalkylaminophenylalkanoic acids and the simple aldehydes.The cleavage of the N-oxides of di(2-chloroethyl)aminophenylalkanoic acids leads to the formation of formaldehyde, whereas the dissociation of the di(2-chloropropyl)-N-oxide group gives a mixture of formaldehyde and acetaldehyde in a ratio of 1:1.The analogous N-oxides containing oxygen instead of the halogen atoms do not decompose under these conditions.
- Degutene, A.,Dzhyuvene, D.,Shukyalene, D.,Degutis, Yu.
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p. 1968 - 1972
(2007/10/02)
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- Acylation of bis(2 chloroethyl)amine (nitrogen mustard)
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The preparation is described of N,N bis [2 chloroethyl] amides of fatty and keto acids, of N,N bis [2 chloroethyl] amino acids and of N [2 chloroethyl] imides and amides as potential cytostatic agents.
- Hauptmann,Poge
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p. 520 - 522
(2007/10/05)
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