申请人:Takeda Chemical Industries, Ltd.
公开号:US04824848A1
公开(公告)日:1989-04-25
Novel pyrazolo[3,4-d]pyrimidine derivatives represented by the general formula (I) ##STR1## wherein R.sup.1 is an aryl or heteroaryl group which may be substituted by one to three members selected from the class consisting of halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, nitro, amino, N-C.sub.1-4 alkylamino, N,N-diC.sub.1-4 alkylamino, hydroxy, trifluoromethyl, carbamoyl, N-C.sub.1-4 alkylcarbamoyl and N,N-diC.sub.1-4 alkylcarbamoyl; R.sup.2 is C.sub.1-4 alkyl; R.sup.3 and R.sup.4 are independently hydrogen or C.sub.1-4 alkyl; R.sup.5 is hydrogen, C.sub.1-2 alkyl, C.sub.1-5 alkanoyl or C.sub.1-4 alkoxycarbonyl, the group R.sup.5 being attached at the 1- or 2-position of the pyrazole ring; X is C.sub.1-7 alkylene or a group of the formula: --(CH.sub.2).sub.m --Y--(CH.sub.2).sub.n -- wherein m is 2 or 3, n is an integer of 0 to 3, and Y is oxygen, sulfur, imino or N-C.sub.1-4 alkylimino; and the dotted line designates the presence of two double bonds in the pyrazole ring and their salts activate cerebral functions and metabolisms.
新型吡唑并[3,4-d]嘧啶衍生物的一般公式(I)如下:其中R.sup.1是芳基或杂环芳基,可以被来自卤素、C.sub.1-4烷基、C.sub.1-4烷氧基、硝基、氨基、N-C.sub.1-4烷基氨基、N,N-二C.sub.1-4烷基氨基、羟基、三氟甲基、氨甲酰基、N-C.sub.1-4烷基氨甲酰基和N,N-二C.sub.1-4烷基氨甲酰基中的一到三个成员取代;R.sup.2是C.sub.1-4烷基;R.sup.3和R.sup.4独立地是氢或C.sub.1-4烷基;R.sup.5是氢、C.sub.1-2烷基、C.sub.1-5烷酰基或C.sub.1-4烷氧羰基,基团R.sup.5连接在吡唑环的1-或2-位置;X是C.sub.1-7烷基或式:--(CH.sub.2).sub.m --Y--(CH.sub.2).sub.n --其中m为2或3,n为0到3的整数,Y为氧、硫、亚胺或N-C.sub.1-4烷基亚胺;虚线表示吡唑环中存在两个双键及其盐激活脑功能和代谢。