For many years we have focused our interests in the synthesis of thienopyrimidine derivatives in order to find compounds endowed with anti-inflammatory and analgesic activity and no or low ulcerogenic activity [1, 2]. On the basis of recent developments in the research of non-steroidal anti-inflammatory drugs (NSAIDs) without ulcerogenic effects, acting as selective inhibitors of enzyme COX-2 [3, 4], we have synthesized new ...