申请人:Drug Delivery System Institute, Ltd.
公开号:US05580904A1
公开(公告)日:1996-12-03
According to the present invention, a novel compound group which can pass through blood-brain barrier (BBB) with carrying a drug thereon and stay within brain to release the drug and a well-known compound group having the properties described above are provided. The compound represented by the general formula ##STR1## wherein, R.sup.1 represents C.sub.1-6 alkyl which may be substituted by a group selected from hydroxyl, carboxyl, amino group which may be substituted by C.sub.1-6 alkyl, and a five- to seven-membered saturated heterocyclic ring, R.sup.2 represents hydrogen or C.sub.1-6 alkyl, R.sup.3 represents hydrogen or C.sub.1-6 alkyl which may be substituted by hydroxyl, R.sup.4 represents hydrogen or C.sub.1-6 alkyl, R.sup.5 represents an amino acid residue, or --S--R.sup.6 or --CO--R.sup.6 wherein R.sup.6 represents C.sub.1-14 alkyl which may be substituted by a five- to seven-membered saturated ring; C.sub.2-6 alkenyl; aryl; or a five- to seven-membered saturated ring; or the group represented by the general formula (IVa): ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have the same meanings as defined above, and .multidot..multidot..multidot..multidot..multidot..multidot..multidot..mult idot..multidot. represents a single bond or a double bond provided that at least one of R.sup.1, R.sup.3 and R.sup.5 contains hydroxyl, carboxyl or amino, and a salt thereof.
根据本发明,提供了一种新的化合物组,该化合物组可以携带药物穿过血脑屏障(BBB),停留在大脑内释放药物,并提供了具有上述特性的众所周知的化合物组。所述化合物由通式##STR1##所表示,其中,R.sup.1代表可由羟基、羧基、氨基(可由C.sub.1-6烷基取代)和五至七元饱和杂环环组成的基团取代的C.sub.1-6烷基,R.sup.2代表氢或C.sub.1-6烷基,R.sup.3代表氢或可由羟基取代的C.sub.1-6烷基,R.sup.4代表氢或C.sub.1-6烷基,R.sup.5代表氨基酸残基,或--S--R.sup.6或--CO--R.sup.6,其中R.sup.6代表可由五至七元饱和环取代的C.sub.1-14烷基;C.sub.2-6烯基;芳基;或五至七元饱和环;或通式(IVa)所表示的基团:##STR2##其中R.sup.1、R.sup.2、R.sup.3和R.sup.4具有如上定义的相同含义,且.multidot..multidot..multidot..multidot..multidot..multidot..multidot..mult idot..multidot.代表单键或双键,前提是R.sup.1、R.sup.3和R.sup.5中至少有一个含有羟基、羧基或氨基,以及其盐。