Synthesis of a novel zwitterionic bisphosphonate cyclopolymer containing residues of alendronic acid
摘要:
The reaction of 4-(diallylammonio)butanoate, H3PO3 and PCl3 in CH3SO3H created water-insoluble 4-diallylamino-1-hydroxybutylidene-1,1-bisphosphonic acid!, a novel monomer that contained residues of the osteoporosis drug alendronic acid. Monomer (+/-) I, a zwitterionic tetraprotic acid, in the presence of 2 equivs. NaOH(aq) and the initiator ammonium persulfate, underwent cyclopolymerization to yield water-soluble poly(zwitterion-dianion) (+/- =) II. Under the influence of pH, H was equilibrated to water-soluble poly(zwitterion-trianion) (+/- equivalent to) III, polytetraanion (= =) IV, poly(zwitterion-anion) (+/- -) V, cationic polyelectrolyte (+) VI and water-insoluble polyzwitterion (+/-) VII. The solution properties of backbone charges were investigated, and protonation constants of several centers in IV were determined. Polymers that contained residues of alendronic acid should have applications in various fields, including the field of medicine. (C) 2014 Elsevier B.V. All rights reserved.
CROSS-LINKED DIALLYL QUATERNARY AMMONIUM SALT TETRAPOLYMERS AND METHODS THEREOF
申请人:King Fahd University of Petroleum and Minerals
公开号:US20160264690A1
公开(公告)日:2016-09-15
Cross-linked tetrapolymers made up of different diallyl zwitterionic diallyl quaternary ammonium salt monomers, with one of them functioning as a cross-linking monomer. The cross-linked terpolymers include a repeating unit with multiple ligand centers that different metal ions can bind to. The cross-linked tetrapolymers are cationic, zwitterionic and anionic, and can be in either an acidic form or a basic form. A method of removing metal ions from an aqueous solution with these cross-linked tetrapolymers is also described.
QUATERNARY AMMONIUM SOLVATED TETRAPOLYMERS AND METHODS OF REMOVING CR(III) FROM SOLUTION USING THE TETRAPOLYMER
申请人:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
公开号:US20180022840A1
公开(公告)日:2018-01-25
Cross-linked tetrapolymers made up of different diallyl zwitterionic diallyl quaternary ammonium salt monomers, with one of them functioning as a cross-linking monomer. The cross-linked terpolymers include a repeating unit with multiple ligand centers that different metal ions can bind to. The cross-linked tetrapolymers are cationic, zwitterionic and anionic, and can be in either an acidic form or a basic form. A method of removing metal ions from an aqueous solution with these cross-linked tetrapolymers is also described.