Synthesis of the butanamide derivative S 19812, a new dual inhibitor of cyclooxygenase and lipoxygenase pathways.

The general synthetic pathway and the interactions with arachidonic acid metabolism of the new compound S 19812 (N-hydroxy-N-methyl 4-(2,3-bis-(4-methoxyphenyl)-thiophen-5-yl)butanamide, CAS 181308-68-9) were investigated. S 19812 was selected for its well balanced dual inhibition of cyclooxygenase and 5-lipoxygenase pathways in vitro in rat polymorphonuclear neutrophils (PMNs) (IC50 PGE2: 0.10 mumol/l, LTB4: 0.