38953-70-7Relevant articles and documents
Allyl palladium complexes bearing carbohydrate-based N-heterocyclic carbenes: Anticancer agents for selective and potent in vitro cytotoxicity
Scattolin, Thomas,Bortolamiol, Enrica,Rizzolio, Flavio,Demitri, Nicola,Visentin, Fabiano
, (2020)
Novel allyl palladium compounds stabilized by carbohydrate-based N-heterocyclic carbenes (NHCs) were prepared and characterized by nuclear magnetic resonance, high-resolution mass spectrometry and elemental analysis. The antiproliferative activity of the compounds was tested on a panel of different tumor lines, especially ovarian cancer and MRC-5 human lung fibroblasts (nontumor cells). These experiments showed that both mixed NHC/PPh3 and NHC/PTA (PTA = 1,3,5-triaza-7-phosphaadamantane) allyl complexes have IC50 (half maximal inhibitory concentration) values comparable and sometimes even significantly lower than cisplatin. Moreover, the mixed NHC/PTA allyl complexes exhibit good activity toward the seven tumor lines tested with a substantial inactivity against normal cells, a necessary condition to avoid the general cytotoxicity of a metallo-drug. Furthermore, this subclass of compounds proved particularly active on the A549 lung cancer tumor line (up to 100-fold more cytotoxic than cisplatin) and exhibited satisfactory cytotoxicity against KURAMOCHI and OVCAR3 cell lines, which are currently considered the best in vitro models for serous ovarian cancer, the most lethal tumor for women worldwide.
Synthesis of chiral imidazolium salts from a carbohydrate and their application in Pd-catalyzed Suzuki-Miyaura reaction
Zhou, Zhonggao,Qiu, Jiabin,Xie, Lifang,Du, Fan,Xu, Guohai,Xie, Yongrong,Ling, Qidan
, p. 1911 - 1918 (2015/02/05)
A series of chiral 1-(acetylated glucopyranosyl)-3-substituted-imidazolium salts [3-substitute = nbutyl (1a), 3-bromopropyl (1b), 2-chloromethyl benzyl (1c), and 4-chloromethyl benzyl (1d)] have been synthesized. Preliminary catalytic studies show that these imidazolinium salts are remarkably efficient in Pd-catalyzed Suzuki-Miyaura reaction. Functionalized aryl boronic acids reaction with aryl halides (including aryl iodides, aryl bromides and activated aryl chlorides) using environmentally friendly conditions (ethanol aqueous and ambient). The excellent isolate yields reveal that the bulky carbohydrate unit is promising for the construction of highly active transition-metal catalyst.
Proton-acceptor properties and capability for mutarotation of some glucosylamines in methanol
Smiataczowa, Kazimiera,Kosmalski, Jaroslaw,Nowacki, Andrzej,Czaja, Malgorzata,Warnke, Zygmunt
, p. 1439 - 1445 (2007/10/03)
N-(m-Nitrophenyl)-β-D-glucopyranosylamine (Gln), N-(N-methylphenyl)- β-D-glucopyranosylamine (Glm), N-β-D-glucopyranosylpyrazole (Glp), and N-β-D-glucopyranosylimidazole (Gli) have been synthesized. Their basicity constants, pKb, determined in methanol were, respectively, 14.99, 14.36, 15.04, and 9.74. The derivatives of secondary amines (Glm, Glp, and Gli) did not mutarotate in methanol in the presence of 3,5-dinitrobenzoic acid and hydrochloric acid. The heats of formation and entropies were calculated by the AM1 and PM3 methods for the glucosylamines and their cations under consideration of two plausible protonation centers. Thermodynamic parameters for the proton transfer in the reaction: glucosylamine+CH3OH2 +=glucosylamineH++CH3OH were determined and the protonation center in the glucosylamine molecule was identified. The mechanism of mutarotation of the glucosylamines is discussed and the conclusion made that formation of an acyclic immonium cation is not a satisfactory condition for the reaction to proceed.