Compounds of formula (I) are CRTH2 ligands, useful in the treatment of, for example, asthma and COPD wherein: R1 is halogen or cyano; R2 is hydrogen or methyl; R3 and R4 are independently —OR6, C1-C6alkyl or C3-C6cycloalkyl, the latter two groups being optionally substituted by one or more halogen atoms; R5 is hydrogen or halogen; R6 is C1-C6 alkyl or C3-C6 cycloalkyl, either of which being optionally substituted by one or more halogen atoms; X is —CH2—, —S—, or —O—; one of Y and Y1 is hydrogen and the other is OR6, —C(═O)R7, NR8SO2R6 or a heterocyclic group selected from those referred to in the specification; and R6, R7 and R8 are as defined in the specification.
式(I)的化合物是CRTH2
配体,在治疗哮喘和
COPD等疾病中有用,其中:R1是卤素或
氰基;R2是
氢或
甲基;R3和R4独立地是—OR6、C1-C6烷基或C3-C6
环烷基,后两种基团可选择地被一个或多个卤素原子取代;R5是
氢或卤素;R6是C1-C6烷基或C3-C6
环烷基,其中任意一个都可以选择地被一个或多个卤素原子取代;X是—
CH2—、—S—或—O—;Y和Y1中的一个是
氢,另一个是OR6、—C(═O)R7、NR8SO2R6或在说明书中提到的选定的杂环基团;R6、R7和R8如说明书所定义。