29980-16-3Relevant academic research and scientific papers
Selective lipase-catalysed 6-O-acylation of alkyl α-D-glucopyranosides using functionalized ethyl esters
Goede, A. T. J. W. de,Benckhuijsen, W.,Rantwijk, F. van,Maat, L.,Bekkum, H. van
, p. 567 - 572 (1993)
Alkyl α-D-glucopyranosides were selectively converted into their 6-O-acyl esters by lipase-catalysed transesterification with ethyl acrylate or ethyl 4-chlorobutanoate.Comparison of six lipase preparations showed large differences in activity and selectivity.The addition of zeolite CaA for selective adsorption of ethanol and water, exerted profound effects on conversion and regioselectivity of the transesterification.A quantitative conversion with high selectivity was achieved using lipases from C. antarctica in the presence of zeolite CaA.
Antimicrobial and cytotoxic activity of (thio)alkyl hexopyranosides, nonionic glycolipid mimetics
Bogdanová, Kate?ina,Combet, Sophie,D?ubák, Petr,Gurská, Soňa,Hajdúch, Marian,Kanjaková, Nina,Klunda, Tomá?,Kolá?, Milan,Poláková, Monika,Uhríková, Daniela
, (2020/01/30)
A series of 19 synthetic alkyl and thioalkyl glycosides derived from D-mannose, D-glucose and D-galactose and having C10–C16 aglycone were investigated for cytotoxic activity against 7 human cancer and 2 non-tumor cell lines as well as for antimicrobial potential on 12 bacterial and yeast strains. The most potent compounds were found to be tetradecyl and hexadecyl β-D-galactopyranosides (18, 19), which showed the best cytotoxicity and therapeutic index against CCRF-CEM cancer cell line. Similar cytotoxic activity showed hexadecyl α-D-mannopyranoside (5) but it also inhibited non-tumor cell lines. Because these two galactosides (18, 19) were inactive against all tested bacteria and yeast strains, they could be a target-specific for eukaryotic cells. On the other hand, β-D-glucopyranosides with tetradecyl (11) and hexadecyl (12) aglycone inhibited only Gram-positive bacterial strain Enterococcus faecalis. The studied glycosides induce changes in the lipid bilayer thickness and lateral phase separation at high concentration, as derived from SAXS experiments on POPC model membranes. In general, glucosides and galactosides exhibit more specific properties. Those with longer aglycone show high cytotoxicity and therefore, they are more promising candidates for cancer cell line targeted inhibition.
Catalytic glycosylation of glucose with alkyl alcohols over sulfonated mesoporous carbons
Ramdani, Wahiba Ghezali,Karam, Ayman,De Oliveira Vigier, Karine,Rio, Sébastien,Ponchel, Anne,Jér?me, Fran?ois
, p. 125 - 129 (2019/03/06)
Herein we investigated the catalytic performances of sulfonated mesoporous carbons in the glycosylation of carbohydrates with alkyl alcohols. Catalytic performances were compared to common solid acid catalysts previously reported for this reaction. Under optimized conditions, the targeted alkyl glycosides were obtained in 85% yield, together with a turn over frequency and a space time yield higher than those of the best heterogeneous catalysts reported so far in such reaction. Furthermore, the presence of mesoporous channels significantly lowered the deactivation rate of the catalyst in comparison to a non-porous sulfonated carbon.
Sweet surfactants: Packing parameter-invariant amphiphiles as emulsifiers and capping agents for morphology control of inorganic particles
Voggel, Michael,Meinusch, Rebecca M.,Siewert, Vanessa,Kunkel, Marius,Wittmann, Valentin,Polarz, Sebastian
, p. 7214 - 7227 (2018/09/26)
Surfactants are not only pivotal constituents in any biological organism in the form of phospholipids, they are also essential for numerous applications benefiting from a large, internal surface, such as in detergents, for emulsification purposes, phase transfer catalysis or even nanoparticle stabilization. A particularly interesting, green class of surfactants contains glycoside head groups. Considering the variability of glycosides, a large number of surfactant isomers become accessible. According to established models in surfactant science such as the packing parameter or the hydrophilic lipophilic balance (HLB), they do not differ from each other and should, thus, have similar properties. Here, we present the preparation of a systematic set of glycoside surfactants and in particular isomers. We investigate to which extent they differ in several key features such as critical aggregation concentration, thermodynamic parameters, etc. Analytical methods like isothermal titration calorimetry (ITC), tensiometry, dynamic light scattering (DLS), small angle-X-ray scattering (SAXS), transmission electron microscopy (TEM) and others were applied. It was found that glycosurfactant isomers vary in their emulsification properties by up to two orders of magnitude. Finally, we have investigated the role of the surfactants in a microemulsion-based technique for the generation of zinc oxide (ZnO) nanoparticles. We found that the choice of the carbohydrate head has a marked effect on the shape of the formed inorganic nanocrystals.
Novel mixed-heteroatom macrocycles via templating: A new protocol
Sabah, Karem J.,Hashim, Rauzah
, p. 1534 - 1537 (2013/03/14)
A series of novel thiadiaza and triaza crown ether attached galactose- and glucose-based glycolipids is synthesized, applying a new strategy. The key step is the formation of α-chloroacetamido precursors (14 and 21) from selectively protected bis(cyanomethyl)-glycolipids (13 and 19) in two steps. The cyclization reaction furnishes good yields in relatively short times in aqueous ethanol or acetonitrile. To generalize this method, macrocycles 3 and 25 are reported as well. Attempts to use the traditional synthetic approaches for cyclization failed to provide reasonable yields.
The anomeric mixture of some O-galactolipid derivatives is more toxic against cancer cells than either anomer alone
Song, Shao-Xing,Wu, Ming-Li,He, Xiao-Peng,Zhou, Yu-Bo,Sheng, Li,Li, Jia,Chen, Guo-Rong
supporting information; experimental part, p. 2030 - 2032 (2012/04/23)
The anomeric mixture of a series of O-galactolipid derivatives is revealed to be more toxic against several cancer cell lines than their either single component with the pure α- or β-configuration. This interesting phenomenon has been confirmed on pairs of synthesized O-galactosyl anomers bearing length-varied alkyl chains at the lipid end. Furthermore, the most potent mixture was determined inoffensive to a normal cell line tested.
Efficient glycosylation of unprotected sugars using sulfamic acid: A mild eco-friendly catalyst
Guchhait, Goutam,Misra, Anup Kumar
experimental part, p. 52 - 57 (2012/01/15)
Sulfamic acid, a mild and environmentally benign catalyst has been successfully used in the Fischer glycosylation of unprotected sugars for the preparation alkyl glycosides. A diverse range of aliphatic alcohols have been used to prepare a series of alkyl glycosides in good to excellent yield.
Cellulose conversion into alkylglycosides in the ionic liquid 1-butyl-3-methylimidazolium chloride
Ignatyev, Igor A.,Mertens, Pascal G. N.,Van Doorslaer, Charlie,Binnemans, Koen,De Vos, Dirk E.
body text, p. 1790 - 1795 (2011/02/21)
The conversion of cellulose into alkylglycosides is carried out in the ionic liquid 1-butyl-3-methylimidazolium chloride in the presence of an acidic catalyst. Primary alcohols like n-butanol and n-octanol were used as alkylating reagents. The acidic resin Amberlyst 15DRY proved to be the optimum heterogeneous catalyst: it catalyzes the hydrolysis of the β(1→4) links in the cellulose polymeric chain as well as the alkylation of the hydroxyl groups at the C1 position of the glucose intermediate. The cellulose was fully converted under mild conditions; in a reaction with n-butanol, the obtained yield of butylglucopyranoside isomers was 86%.
Easy production of a glycolipid analogue using animal cells in culture
Kasuya, Maria Carmelita Z.,Hatanaka, Kenichi
experimental part, p. 440 - 446 (2010/09/05)
A glycolipid analogue, GM4-type ganglioside, was obtained by a combination of chemical synthesis and biosynthetic processes in animal cells with dodecyl β-d-galactoside (Gal C12) as primer. The primer was conveniently prepared in two steps: glycosylation, followed by deacetylation. The primer was introduced to mouse melanoma B16 cells to serve as substrate for cellular, enzyme-catalyzed glycosylation. Incubation of the cells in the presence of the primer resulted in sialylation of the galactose residue to afford a GM4 analogue that was released from the cells to the culture medium. The strategy of preparation of the GM4 analogue described in this study is a viable alternative to the existing methods. The saccharide-primer method is fast, convenient, not requiring expensive enzymes and glycosyl donors, and highly stereoselective.
Simple and convenient synthesis of a fluorinated GM4 analogue
Kasuya, Maria Carmelita,Ito, Ayaka,Hatanaka, Kenichi
, p. 562 - 565 (2007/12/27)
A series of fluorinated galactosides, dodecyl 2-deoxy-2-fluoro-β-d-galactopyranoside (2F Gal), dodecyl 4-deoxy-4-fluoro-β-d-galactopyranoside (4F Gal) and dodecyl 6-deoxy-6-fluoro-β-d-galactopyranoside (6F Gal), was chemically synthesized and introduced to B16 cells to serve as scaffolds for cellular enzyme glycosylation. Results showed that the presence of fluorine exercised significant effects on cell viability. Among the fluorinated galactosides used, 2F Gal was glycosylated to afford a GM4 analogue.
