Cationically modified 6-deoxy-6-azido cellulose as a water-soluble and reactive biopolymer derivative

Synthesis and characterization of novel water-soluble and bactericidic cationic starch esters

“…In particular, the reaction of polysaccharides with 2,3‐epoxypropyltrimethylammonium chloride yields water‐soluble cellulose‐ and starch ethers ; the latter have been established as agents for the removal of accumulated pollutants in water recycle systems . Furthermore, ammonium group‐containing carboxylic acid cellulose esters and mixed esters have been prepared by conversion of cellulose or various cellulose derivatives with 3‐carboxypropyltrimethylammonium chloride (CPTMACl) to ensure water‐solubility . In contrast, the synthesis of ammonium group‐containing starch esters is limited to the preparation of starch betaines with low DS, which find application in manufacture of paper .…”

Alkyne cellulose for Huisgen [3 + 2] cycloaddition with azido‐terminated targets

“…That was why the 13 C-NMR spectra of 7a is missing in Figure 2. The newly formed five-membered triazole rings of triazole cellulose showed FTIR absorption stretching around 1230 cm 21…”

“…first introduced azide groups onto cellulose and used the Huisgen reaction, with alkyne‐terminated functional modules, to produce cellulose with carboxylic ester, thiophene, and aniline moieties. Since then, Huisgen cycloaddition has been used to modify cellulose for specific functionalities, such as hyperbranched glycerol, redox active ferrocene, clay, cationic groups, and biopolymer derivatives …”

“…Click chemistry reactions are modular and widely applicable reactions that are expected to have a high yield and to be selective, mild, and controllable in nature. [11][12][13][14] Previously reported click chemistry reactions for cellulose modification can be categorized as follows: azidealkyne cycloaddition, [15][16][17][18][19][20][21] thiol-ene reaction, 22 and Diels-Alder cycloaddition. 23 Among the multiple named click reactions, much attention has been paid to the Huisgen 1,3-dipolar cycloaddition reaction.…”

“…Heinze et al 15 first introduced azide groups onto cellulose and used the Huisgen reaction, with alkyne-terminated functional modules, to produce cellulose with carboxylic ester, thiophene, and aniline moieties. Since then, Huisgen cycloaddition has been used to modify cellulose for specific functionalities, such as hyperbranched glycerol, 16 redox active ferrocene, 18 clay, 19 cationic groups, 21 and biopolymer derivatives. 24,25 It is essential to note that cellulose prepolymers for postmodification strategies via Huisgen cycloaddition can be synthesized as either azide-grafted cellulose or alkyne-terminated cellulose.…”