Compounds of formula (I):
[wherein: I is 2 - 4; A and B are oxygen or sulphur; one of R1 and R2 represents a long chain alkyl, alkylcarbamoyl or aliphatic acyl group and the other of R1 and R2 represents a group of formula (III) :
in which E represents a single bond, a bivalent heterocyclic group or a group of formula -CO-, -COO- or -CONR6 -, where R6 is hydrogen or an imino-protecting group; m is 0 - 3; n is 0 -10; q is 0 or 1; R4 is optionally protected hydroxy, mercapto or carboxy; and Q is an amino or nitrogen-containing heterocyclic group] are PAF antagonists which may be used to treat asthma, hypotension, inflammation and shock. They may be prepared by introducing the appropriate group R1 and/or R2 into a compound In which one or both of these groups is replaced by an active group.
式(I)化合物:
其中I 为 2 - 4;A 和 B 为氧或
硫;R1 和 R2 中的一个代表长链烷基、烷基
氨基甲酰基或脂族酰基,R1 和 R2 中的另一个代表式(III)的基团:
其中 E 代表单键、二价杂环基团或式-CO-、-COO-或-CONR6-的基团,其中 R6 是氢或亚
氨基保护基团;m 是 0 - 3;n 是 0 - 10;q 是 0 或 1;R4 是任选保护的羟基、巯基或羧基;Q 是
氨基或含氮杂环基团]是 PAF 拮抗剂,可用于治疗哮喘、低血压、炎症和休克。它们可以通过在化合物中引入适当的基团 R1 和/或 R2 来制备,其中一个或两个基团被活性基团取代。