Thiocarbonylthio Compounds [SC(Ph)S−R] in Free Radical Polymerization with Reversible Addition-Fragmentation Chain Transfer (RAFT Polymerization). Role of the Free-Radical Leaving Group (R)
作者:) Y. K. Chong、Julia Krstina、Tam P. T. Le、Graeme Moad、Almar Postma、Ezio Rizzardo、San H. Thang
DOI:10.1021/ma020882h
日期:2003.4.1
character on the polymerization. This paper explores the effect of the substituents R of dithiobenzoate RAFT agents [SC(Ph)S−R] on the outcome of polymerizations of styrene, methylmethacrylate (MMA) and butyl (BA) or methyl acrylate (MA). In MMA polymerization at 60 °C, effectiveness depends strongly on R decreasing in the order where R is: −C(Alkyl)2CN ∼ −C(Me)2Ar > −C(Me)2C(O)O(alkyl) > −C(Me)2C(O)NH(alkyl)
Polymeric prodrugs and subcutaneous and/or intramuscular administration thereof
申请人:CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
公开号:US20200353090A1
公开(公告)日:2020-11-12
The invention relates to new prodrugs of active molecules. These prodrugs allow, in particular, the subcutaneous or intramuscular administration of active molecules of which the subcutaneous or intramuscular administration is problematic or impossible, in particular because of the toxicity at the injection site. The prodrugs according to the invention comprise an active ingredient, covalently linked with a polymer chain, preferably a hydrophilic and/or thermosensitive polymer chain. The invention relates, in particular, to polymeric prodrugs comprising a polymer chain formed at least in part by acrylamide monomer or one of its derivatives, the polymer comprising a proximal part and a terminal part; a first pharmaceutically active molecule covalently coupled to the proximal part of the polymer; possibly a second pharmaceutically active molecule covalently coupled to the terminal part of the polymer.
Polymerizable sulfonamide compounds and polymers thereof
申请人:Massachusetts Institute of Technology
公开号:US11155674B2
公开(公告)日:2021-10-26
Methods, compositions, reagents, and systems that allow for the preparation and utilization of sulfonamide salt polymer electrolytes are disclosed herein. Methods and reagents to prepare sulfonamide salt monomers are also disclosed herein. The sulfonamide salt polymer electrolytes can be used as components in energy storage devices, conductive materials, electrochemical cells, gels, adhesives, and drug delivery vehicles.
Process for the preparation of graft copolymers by Reversible Addition Fragmentation Chain Transfer (RAFT) and Ring Opening Polymerisation (ROP)
申请人:Polymers Australia PTY Limited
公开号:EP1950232A1
公开(公告)日:2008-07-30
A combined RAFT/ROP process for the preparation of a graft co-polymer having a backbone built-up from repeating units derived by polymerization of free-radically polymerizable monomers comprising vinylic monomers, and polyester side chains grafted to said backbone derived by ring-opening polymerisation of cyclic ester compounds; said process comprising reacting a mixture of
(a) one or more vinylic monomers, optionally in combination with other monomers susceptible to free-radical polymerization, wherein at least one of said vinylic monomers comprises a (free) hydroxyl group;
(b) a thiocarbonylthio compound as chain transfer agent;
(c) one or more cyclic esters, which is/are susceptible to a ring-opening polymerization; and
(d) a compound effective for initiating the ring-opening polymerization of the one or more cyclic esters;
and reacting said mixture in an inert solvent at a temperature of more than 90°C under exclusion of oxygen to form the graft copolymer.
A transition metal mediated chain transfer agent controlled polymerization process is described. The process combines the advantages of atom transfer radical polymerization (ATRP) and reversible addition fragmentation transfer (RAFT) polymerization. Synthesis of chain transfer agents useful in the disclosed processes is also disclosed. Other improvements on ATRP RAFT processes are also described.