申请人:Nippon Zoki Pharmaceutical Co., Ltd.
公开号:US06242452B1
公开(公告)日:2001-06-05
Compounds which exhibit excellent bronchodilating action with low side effects and are 7-amino-1-phenylpyrido[2,3-d]pyrimidine-2,4-dione derivatives represented by the formula (I) or a pharmaceutically acceptable salt or hydrate thereof:
wherein R1 is hydrogen, lower alkenyl, phenyl or lower alkyl which is optionally substituted with a substituent selected from the following substituents(a) to (i);
(a) oxo,
(b) lower alkoxy,
(c) phenyl which is optionally substituted with one or more lower alkyl, lower alkoxy, carboxyl, lower alkoxycarbonyl, mercapto, halogen, trifluoromethyl and/or nitro;
(d) naphthyl,
(e) furyl,
(f) isoxazolyl which is optionally substituted with one or more lower alkyl,
(g) pyridyl which is optionally substituted with one or more lower alkyl and/or halogen,
(h) thienyl which is optionally substituted with halogen, and
(i) 1,3-dioxolanyl;
and R2, R3 and R4 each independently is hydrogen, halogen, lower alkoxy, benzyloxy, carboxyl or lower alkoxycarbonyl. The compounds of the present invention exhibit unexpectedly superior bronchodilating action, safety, and rapid transfer into the blood stream and prolonged half life in the blood stream. Accordingly, the compounds and pharmaceutical compositions containing them are useful as therapeutic agents for bronchial asthma.
具有卓越的支气管扩张作用和低副作用的化合物,为7-氨基-1-苯基吡啶[2,3-d]嘧啶-2,4-二酮衍生物,其化学式为(I)或其药学上可接受的盐或水合物:其中R1为氢、低碳烯基、苯基或低烷基,可选地取代以下取代基之一:(a)羰基,(b)低烷氧基,(c)苯基,可选地取代一个或多个低烷基、低烷氧基、羧基、低烷氧羰基、巯基、卤素、三氟甲基和/或硝基;(d)萘基,(e)呋喃基,(f)异噁唑基,可选地取代一个或多个低烷基,(g)吡啶基,可选地取代一个或多个低烷基和/或卤素,(h)噻吩基,可选地取代卤素,以及(i)1,3-二氧戊基;而R2、R3和R4各自独立地为氢、卤素、低烷氧基、苄氧基、羧基或低烷氧羰基。本发明的化合物表现出意外的卓越支气管扩张作用、安全性、快速转运入血流和在血流中的长半衰期。因此,含有这些化合物的制药组合物可用作支气管哮喘的治疗剂。