申请人:AJINOMOTO CO., INC.
公开号:EP0288176A1
公开(公告)日:1988-10-26
Novel O-alkyl tyrosine derivatives of low toxicity have the effect of enhancing absorption of pharmaceutically active substances such as peptides, administered by mouth or as a suppository: compounds of the invention are those of formula (I) below, esters and salts thereof wherein R¹ is a lower alkyl group optionally substituted with an alkyloxy group; X is CO or SO₂; -Y- is either a direct bond, lower alkylene group, substituted or unsubstituted vinylene group, or a group expressed as -CHR³-O- or -O-CHR³-; R² is a substituted or unsubstituted phenyl group, naphthyl group or 2-benzo-furanyl group; R³ is either hydrogen or lower alkly group; or in the formula (I). R₂-Y-X denotes N-benzyloxycarbonyl phenylalanyl, N-benzyloxycarbonyl-4-halogenophenylalanyl, or N-(m-methoxycinnamoyl) phenylalanyl group.
新颖的低毒性O-烷基酪氨酸衍生物具有增强口服或栓剂给药的药用活性物质(如肽类)吸收的效果:发明的化合物为以下式(I)的化合物,其酯和盐,其中R¹是一个低烷基基团,可选择地被烷氧基基团取代;X是CO或SO₂;-Y-可以是直接键,低烷基烯基团,取代或未取代的乙烯基团,或表示为-CHR³-O-或-O-CHR³-的基团;R²是取代或未取代的苯基团,萘基团或2-苯并呋喃基团;R³是氢或低烷基基团;或在式(I)中。R₂-Y-X表示N-苄氧羰基苯丙氨基,N-苄氧羰基-4-卤苯丙氨基,或N-(m-甲氧基肉桂酰)苯丙氨基基团。