The compound of the present invention is a novel compound which has a specific heterocycle skeleton, particularly a pyrazolonaphthyridine or pyrazoloquinoline skeleton having an organic group (e.g., a carbocycle and a heterocycle) bonding through an alkylene group at 3-position and a carbocycle bonding at 5-position and has a phosphodiesterase IV inhibitory activity. At least one of the ring (the carbocycle or the heterocycle) bonding at 3-position of the pyrazolonaphthyridine skeleton and the carbocycle bonding at 5-position may have a halogenated alkyl group and/or a halogenated alkoxy group as a substituent. Such a compound or a salt thereof is useful as a phosphodiesterase IV inhibitor and the like. According to the present invention, a novel compound having a high phosphodiesterase IV inhibitory effect can be provided.
本发明的化合物是一种新型化合物,具有特定的杂环骨架,特别是具有通过3位的烷基与5位的
碳环键合的有机基团(例如,
碳环和杂环)的
吡唑萘啶或
吡唑喹啉骨架,并具有
磷酸二酯酶IV抑制活性。在
吡唑萘啶骨架的3位键合的环(
碳环或杂环)和5位键合的
碳环中,至少有一个可以具有卤代烷基和/或卤代烷
氧基作为取代基。这种化合物或其盐可用作
磷酸二酯酶IV
抑制剂等。根据本发明,可以提供一种具有高
磷酸二酯酶IV抑制效果的新型化合物。