4124-41-8Relevant articles and documents
New carboxymethyl cellulose tosylate with low biodeterioration
Orehek, Janez,Petek, Klemen,Dogsa, Iztok,Stopar, David
, p. 16 - 21 (2014)
Microbial biodegradation and biodeterioration of cellulose based thickeners is a serious problem in industry. A new tosylic ester of carboxymethyl cellulose (TsCMC) was prepared with anhydride of p-toluensulphonic acid. The TsCMC has improved rheological properties, higher viscosity and pseudoplasticity, superior emulsification properties and decreased wettability compared to parental CMC. The biodeterioration of TsCMC was significantly reduced compared to parental CMC or other commercially used modified cellulose thickeners in water based paint industry. Improved rheological properties combined with low biodeterioration make TsCMC a promising new material for industrial applications with a potential to reduce the use of hazardous antimicrobial agents.
An improved synthesis of 6-O-monotosyl-6-deoxy-β-cyclodextrin
Zhong, Ning,Byun, Hoe-Sup,Bittman, Robert
, p. 2919 - 2920 (1998)
Addition of p-toluenesulfonic anhydride (Ts2O) to β-cyclodextrin (CD) in water, followed by treatment with 10% aqueous NaOH solution for 10 min and removal of excess Ts2O by filtration, gave mono-6-deoxy-6-(O-p- toluenesulfonyl)-CD (1) in 61% yield.
Efficient modification of PAMAM G1 dendrimer surface with β-cyclodextrin units by CuAAC: Impact on the water solubility and cytotoxicity
González-Méndez, Israel,Illescas, Javier,Martínez-Serrano, Ricardo D,Rivera, Ernesto,Ruiu, Andrea,Solano, José D,Sorroza-Martínez, Kendra,Zhu, Xiao Xia
, p. 25557 - 25566 (2020/10/02)
The toxicity of the poly(amidoamine) dendrimers (PAMAM) caused by the peripheral amino groups has been a limitation for their use as drug carriers in clinical applications. In this work, we completely modified the periphery of PAMAM dendrimer generation 1 (PAMAM G1) with β-cyclodextrin (β-CD) units through the Cu(i)-catalyzed azide-alkyne cycloaddition (CuAAC) to obtain the PAMAM G1-β-CD dendrimer with high yield. The PAMAM G1-β-CD was characterized by 1H- and 13C-NMR and mass spectrometry studies. Moreover, the PAMAM G1-β-CD dendrimer showed remarkably higher water solubility than native β-CD. Finally, we studied the toxicity of PAMAM G1-β-CD dendrimer in four different cell lines, human breast cancer cells (MCF-7 and MDA-MB-231), human cervical adenocarcinoma cancer cells (HeLa) and pig kidney epithelial cells (LLC-PK1). The PAMAM G1-β-CD dendrimer did not present any cytotoxicity in cell lines tested which shows the potentiality of this new class of dendrimers.
Process for the preparation of aromatic sulfonic anhydrides
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Page/Page column 5, (2008/06/13)
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