2409-15-6Relevant articles and documents
Hierarchical Self-Assembly of Amphiphilic β-C-Glycosylbarbiturates into Multiresponsive Alginate-Like Supramolecular Hydrogel Fibers and Vesicle Hydrogel
Yao, Shun,Brahmi, Robin,Portier, Fran?ois,Putaux, Jean-Luc,Chen, Jing,Halila, Sami
supporting information, p. 16716 - 16721 (2021/10/19)
Ordered molecular self-assembly of glycoamphiphiles has been regarded as an attractive, practical and bottom-up approach to obtain stable, structurally well-defined, and functional mimics of natural polysaccharides. This study describes a versatile and rational design of carbohydrate-based hydrogelators through N,N’-substituted barbituric acid-mediated Knoevenagel condensation onto unprotected carbohydrates in water. Amphiphilic N-substituted β-C-maltosylbarbiturates self-assembled into pH- and calcium-triggered alginate-like supramolecular hydrogel fibers with a multistimuli responsiveness to temperature, pH and competitive metal chelating agent. In addition, amphiphilic N,N’-disubstituted β-C-maltosylbarbiturates formed vesicle gels in pure water that were scarcely observed for glyco-hydrogelators. Finally, barbituric acid worked as a multitasking group allowing chemoselective ligation onto reducing-end carbohydrates, structural diversity, stimuli-sensitiveness, and supramolecular interactions by hydrogen bonding.
Some Extensions of von Braun (BrCN) Reaction on Organic Bases, Part IV
Siddiqui, Salimuzzaman,Haider, S. Imtiaz,Ahmad, S. Salman,Siddiqui, B. Shaheen
, p. 546 - 549 (2007/10/02)
Extensions of von Braun cyanogen bromide reaction have been undertaken on some aliphatic and heterocyclic amines.Monocyanamides of all these bases yielded their respective urea and carboxamide derivatives on hydrolysis with dilute hydrochloric acid.They also gave the amido derivatives on reaction with Zn/HCl, as in the case of diisobutyl and di-2-butyl cyanamides. - Key words: von Braun Cyanogen Bromide Reaction
