14019-62-6Relevant articles and documents
Task-specific, biodegradable amino acid ionic liquid surfactants
Trivedi, Tushar J.,Rao, K. Srinivasa,Singh, Tejwant,Mandal, Subir Kumar,Sutradhar, Narottom,Panda, Asit Baran,Kumar, Arvind
, p. 604 - 608 (2011)
VersatAAIL Surfactants: Biodegradable, chiral amino acid ionic liquid surfactants (AAILSs) with a very high surface activity are synthesized and characterized. The AAILS can be applied as task-specific ionic liquids; two examples given are the mitigation of harmful algal blooms from sea water and the shape- and size-specific synthesis of nanomaterials. Copyright
The reactions of α-amino acids and α-amino acid esters with high valent transition metal halides: synthesis of coordination complexes, activation processes and stabilization of α-ammonium acylchloride cations
Biancalana, Lorenzo,Bortoluzzi, Marco,Ferretti, Eleonora,Hayatifar, Mohammad,Marchetti, Fabio,Pampaloni, Guido,Zacchini, Stefano
, p. 10158 - 10174 (2017/02/15)
Titanium tetrachloride smoothly reacted with a selection of α-amino acids (aaH) in CH2Cl2 affording yellow to orange solid coordination compounds, 1a-d, in 70-78% yields. The salts [NHEt3][TiCl4(aa)], 2a-b, were obtained from TiCl4/aaH/NEt3 (aa = l-phenylalanine, N,N-dimethylphenylalanine), in 60-65% yields. The complex , 3, was isolated from the reaction of l-proline with NbCl5/NHiPr2, performed in CH2Cl2 at room temperature. The X-ray structure of 3 features a bridging (E)-1,2-bis(3,4-dihydro-2H-pyrrol-5-yl)ethene-1,2-diolate ligand, resulting from the unprecedented C-C coupling between two proline units. Unusually stable α-ammonium acyl chlorides were prepared by the reactions of PCl5/MCln (MCln = NbCl5, WCl6) with l-proline, N,N-dimethylphenylalanine, sarcosine and l-methionine. MX5 (M = Nb, Ta; X = F, Cl) reacted with l-leucine methylester and l-proline ethylester to give ionic coordination compounds, [MX4L2][MX6] (M = Nb, L = Me2CHCH2CH(NH2)CO2Me, X = F, 9; Cl, 11a; M = Nb, X = Cl, , 11c; Ta, 11d), in moderate to good yields. [NbCl5(Me2CHCH2CHNH3CO2Me)][NbCl6], 12, was isolated as a co-product of the reaction of NbCl5 with l-leucine isopropylester, and crystallographically characterized. The reaction of NbCl5 with l-serine isopropylester afforded NbCl3(OCH2CHNHCO2iPr), 13, in 66% yield. The activation of the ester O-R bond was observed in the reactions of l-leucine methyl ester with NbF5 and l-proline ethyl ester with MBr5 (M = Nb, Ta), these reactions proceeding with the release of EtF and EtBr, respectively. All the metal products were characterized by analytical and spectroscopic methods, while DFT calculations were carried out in order to provide insight into the structural and mechanistic aspects.
Antibacterial preservative is sorbic acid amino ester derivative and its preparation method
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Paragraph 0046, (2016/11/02)
The invention belongs to the field of synthesis of a drug, and relates to a sorbic acid-amino acid ester derivate of an antimicrobial preservative and a preparation method thereof. The preparation method comprises the steps of: enabling amino acid and alcohol to react to generate amino-acid ester by utilizing an acyl chloride method, and then reacting with amino-acid ester by sorbic acid after acylating chlorination, so as to synthesize the amino acid ester derivate of the sorbic acid. The amino acid ester derivate of the novel compound sorbic acid obtained by the method has no sensitization on skin of a human body, is suitable for different pH systems with large ranges, has antibacterial broad-spectrum property and good potential application value, and can be used as the antimicrobial preservative applied to corrosion prevention and antibiosis of foods, drugs, cosmetics, pesticides, leather products and wood materials.
