[EN] BIODEGRADABLE TREHALOSE GLYCOPOLYMERS<br/>[FR] GLYCOPOLYMÈRES BIODÉGRADABLES DE TRÉHALOSE
申请人:UNIV CALIFORNIA
公开号:WO2016025668A1
公开(公告)日:2016-02-18
Structures and methods of making biodegradable trehalose co-polymers are disclosed. Specifically, biodegradable trehalose co-polymers consist of the general structure R5-[R1R2C - CR3R4]n-[DG]m-R6, wherein R1-R4 are independently selected from hydrogen or a side chain comprising at least one carbon atom, and wherein at least one of R1-R4 is a side chain comprising -L-trehalose, wherein L is a linker molecule that links trehalose to the monomer through at least one of the trehalose hydroxyl groups (-OH), wherein DG is a biodegradable group, and wherein R5 and R6 are end groups.
The present invention relates to a polymer obtained from the polymerization of: (i) at least one monomer of formula (I) (CH
2
═CR
1
)CO—K (1) wherein: K represents O—Z or NH—Z, Z representing (CR
2
R
3
)m-CH
3
, (CH
2
—CH
2
—O)m-H, (CH
2
—CH
2
—O)m-CH
3
, (CH
2
)m-NR
4
R
5
with m representing an integer from 1 to 30; R
1
, R
2
, R
3
, R
4
and R
5
independently represent H or a C1-C6 alkyl; (ii) at least between 0.1 and 50% mol, advantageously between 1 and 30% mol, more advantageously between 1 and 20 mol % of a cyclic monomer having a exomethylene group of formula (II) wherein: R6, R7, R8 and R9 represent independently H or a C5-C7 aryl group or R6 and R9 are absent and R7 and R8 form together with the carbon atom on which they are bonded a C5-C7 aryl group; i and j represent independently an integer chosen between 0 and 2; X represents either O or X is not present and in this latter case, CR6R7 and CR8R9 are linked via a single bond C—C and (iii) at least one bio-resorbable block copolymer cross-linker.
Preparation of Racemic and Enantiomerically Pure Cyclic Ketene Acetals
作者:A. Díaz-Ortiz、E. Díez-Barra、A. de la Hoz、P. Prieto
DOI:10.1080/00397919308009850
日期:1993.7
Abstract Cyclic keteneacetals have been prepared from a-haloaldehyde dimethylacetals by transacetalization and subsequent elimination in PTC without solvent conditions. No racemization has been observed when an enantiomerically pure diol has been used. Stability and storage conditions have been studied.
A ring to rule them all: a cyclic ketene acetal comonomer controls the nitroxide-mediated polymerization of methacrylates and confers tunable degradability
作者:Vianney Delplace、Elise Guégain、Simon Harrisson、Didier Gigmes、Yohann Guillaneuf、Julien Nicolas
DOI:10.1039/c5cc04610f
日期:——
2 Methylene-4-phenyl-1,3-dioxolane (MPDL) was used as a controlling comonomer in NMP with oligo(ethylene glycol) methyl ether methacrylate (MeOEGMA) to prepare well-defined and degradable PEG-based P(MeOEGMA-co-MPDL) copolymers.
A new methodology leading to ketene O,O- and S,S-acetals is reported. The title compounds were prepared from the corresponding halogenated precursors under microwave irradiation in the absence of solvent within 5–25 minutes with excellent yields. Yields obtained under microwaves are by far the best when compared to those obtained by ultrasound or classical heating in the same conditions of time and