The present invention relates to thioic acids according to formula I, suitable as building block for polythioesters;
Wherein X is O, N or S and whereby
R1 is chosen from (-CH2-)2, -CH2-O-CH2- or (-CH2-)3 ;
if R1=(-CH2-)2 and X=O, R2 is chosen from a non-degradable polymer with a Mw>6000, a degradable polymer or oligomer, an aliphatic compound comprising at least 2 C atoms and a Mw<5000 or an aromatic compound comprising at least 2 aromatic rings;
if R1=(-CH2-)2 and X=N or S or if R1=(-CH2-)3, R2 is chosen from a monomer, oligomer or polymer.
If R1 = (-CH2-)2, R2 is preferably chosen from polyethyleneglycol (PEG) with a Mw>6000 or a degradable polymer or oligomer.
If R1=(-CH2-)2 and X=N or S or if R1=(-CH2-)3, R2 is preferably chosen from a biodegradable oligomer or polymer chosen from poly (lactide) (PLLA), polyglycolide (PGA), co-oligomers or copolymers of PLA and PGA (PLGA), poly(anhydrides), poly(trimethylenecarbonates), poly(orthoesters), poly(dioxanones), poly(ε-caprolactones) (PCL) or polyesteramides.
本发明涉及符合以下式I的
硫酸,作为聚
硫酯的构建块;
其中X为O、N或S,且
R1选择自(-
CH2-)2、- -O- -或(- -)3;
如果R1=(- -)2且X=O,则R2选择自Mw>6000的不可降解聚合物、可降解聚合物或寡聚物、至少含有2个C原子且Mw<5000的脂肪族化合物或至少含有2个芳香环的芳香族化合物;
如果R1=(- -)2且X=N或S,或者R1=(- -)3,则R2选择自单体、寡聚物或聚合物。
如果R1=(- -)2,则R2优选选择自Mw>6000的聚
乙二醇(P
EG)或可降解聚合物或寡聚物。
如果R1=(- -)2且X=N或S,或者R1=(- -)3,则R2优选选择自可
生物降解寡聚物或聚合物,选择自聚(
乳酸)(PL
LA)、聚
乙醇酸(
PGA)、P
LA和
PGA的共寡聚物或共聚物(PLGA)、聚(酸酐)、聚(三甲基
碳酸酯)、聚(正交酯)、聚(二氧
环己酮)、聚(
ε-己内酯)(PCL)或聚酯酰胺。