申请人:Chinoin Gyogyszer es Vegyeszeti Termekek Gyara R.T.
公开号:US04452982A1
公开(公告)日:1984-06-05
A process is disclosed for the preparation of compounds of the formula (I) ##STR1## wherein R.sup.1 and R.sup.2 are each hydrogen or lower alkyl; R.sup.3 is carboxy, lower alkoxycarbonyl, carbamoyl, carbamoyl substituted by one or two lower alkyl groups, or cyano; R.sup.4 is hydrogen, lower alkyl, phenyl, naphthyl, phenyl or naphthyl substituted by at least one fluoro, chloro, bromo, iodo, lower alkyl, lower alkoxy, hydroxy, carboxy, or phenyl, pyridyl or tetrazolyl; and R.sup.5 is hydrogen or lower alkyl; or a pharmaceutically acceptable salt, hydrate, stereoisomer, optically active isomer, geometric isomer, or tautomer thereof, which comprises the step of aminating a racemic or optically active compound of the formula (II) ##STR2## wherein X is halogen with a compound of the formula (III) ##STR3## or a pharmaceutically acceptable acid addition salt thereof. The compound of formula (II) possess antiallergic, especially antiasthma, activity.
本发明公开了一种制备式(I)化合物的方法:其中R1和R2分别为氢或低烷基;R3为羧基、低烷氧羰基、氨基甲酰基、氨基甲酰基被一个或两个低烷基取代的、或氰基;R4为氢、低烷基、苯基、萘基、被至少一个氟、氯、溴、碘、低烷基、低烷氧基、羟基、羧基、或苯基、吡啶基或四唑基取代的苯基或萘基;R5为氢或低烷基;或其药学上可接受的盐、水合物、立体异构体、光学活性异构体、几何异构体或互变异构体,其包括将式(II)的外消旋或光学活性化合物与式(III)的化合物或其药学上可接受的酸加成盐进行氨化的步骤。式(II)的化合物具有抗过敏,特别是抗哮喘的活性。