The present invention describes pyridazinone compounds of formula (I) which are cyclooxygenase (COX) inhibitors, and in particular, are selective inhibitors of cyclooxygenase-2 (COX-2). COX-2 is the inducible isoform associated with inflammation, as opposed to the constitutive isoform, cyclooxygenase-1 (COX-1) which is an important 'housekeeping' enzyme in many tissues, including the gastrointestinal (GI) tract and the kidneys. The selectively of these compounds for COX-2 minimizes the unwanted GI and renal side-effects seen with currently marketed non-steroidal anti-inflammatory drugs (NSAIDs).
本发明描述了式(I)的
吡啶酮化合物,它们是环
氧合酶(COX)
抑制剂,特别是选择性
抑制剂环
氧合酶-2(COX-2)。COX-2是与炎症有关的诱导型同工酶,而非构成型同工酶环
氧合酶-1(COX-1),后者是许多组织(包括胃肠道和肾脏)中重要的“管家”酶。这些化合物对COX-2的选择性最小化了目前市场上非甾体类抗炎药(N
SAIDs)所见的不良胃肠道和肾脏副作用。