申请人:Interx Research Corporation
公开号:US04000132A1
公开(公告)日:1976-12-28
There is provided, a method for synthesizing certain selected pro-drug forms of theophylline, having the formula: ##STR1## wherein R represents a member selected from the group consisting of a straight or branched C.sub.4 -C.sub.20 alkyl group, a straight or branched C.sub.4 -C.sub.20 alkenyl group, a substituted phenyl group or a substituted or unsubstituted naphthyl group whose substituents are selected from the group consisting of a hydroxy group, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group, a C.sub.1 -C.sub.4 acyloxy group, and a halogen atom and a substituted or unsubstituted heteroaromatic group whose substituents are selected from the group consisting of a hydroxy group, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group, a C.sub.1 -C.sub.4 acyloxy group, and a halogen atom, and wherein A represents a member selected from the group consisting of a --CO-- group, a --CO--(CH.sub.2).sub.n --CO-- group, wherein n represents an integer of from 1 to 16, a --CO--CH=CH--CO-- group (cis or trans) a ##STR2## group and a ##STR3## group, which comprises: Reacting theophylline with an appropriate acid in the presence of dimethylformamide, COCl.sub.2 or SOCl.sub.2, organic tertiary or aromatic amine base or inert carrier gas for removing HCl, and suitable solvent. The compounds prepared by this process are useful for treating asthma by releasing theophylline in sustained manner.
提供了一种合成茶碱的某些选择性前药形式的方法,其化学式为:##STR1## 其中R代表从以下组中选择的一种成员,该组由直链或支链C.sub.4-C.sub.20烷基、直链或支链C.sub.4-C.sub.20烯基、取代苯基或取代或未取代萘基组成,其取代基选择自羟基、C.sub.1-C.sub.4烷基、C.sub.1-C.sub.4烷氧基、C.sub.1-C.sub.4酰氧基、卤素原子及取代或未取代的杂环芳基,其取代基选择自羟基、C.sub.1-C.sub.4烷基、C.sub.1-C.sub.4烷氧基、C.sub.1-C.sub.4酰氧基、卤素原子,其中A代表从以下组中选择的一种成员,该组由--CO--基、--CO--(CH.sub.2).sub.n--CO--基(其中n为1至16的整数)、--CO--CH=CH--CO--基(顺反异构体)、##STR2##基和##STR3##基组成,该方法包括:在二甲基甲酰胺、COCl.sub.2或SOCl.sub.2、有机三级或芳香胺碱基或惰性载气体的存在下,用适当的酸与茶碱反应,并使用适当的溶剂去除HCl。通过此过程制备的化合物可用于通过持续释放茶碱治疗哮喘。