Novel Thiazole Derivatives as Inhibitors of Superoxide Production by Human Neutrophils: Synthesis and Structure-Activity Relationships
摘要:
Neutrophils have an important role in the self-defense systems of organisms through the production of superoxide. On the other hand, it has been proposed that abnormal amounts of superoxide produced by neutrophils are a serious factor in tissue injury. A series of novel thiazole derivatives was prepared and evaluated inhibitory effect on superoxide production by human neutrophils in vitro. Among these compounds, 6-[2-(3,4-diethoxyphenyl)thiazol-4-yl]-pyridine-2-carboxylic acid (OPC-6535) was selected as one of the most promising compounds. The synthesis and structure-activity relationships of these compounds are reported herein.
With the aim of developing novelannulationsvia ketene intermediates, allenyl imide and alkynoates bearing good leaving groups are used for their function in a tandem conjugate addition–elimination reaction (SN2′ type) promoted by nucleophilic phosphine catalysts. By utilizing thioamides as 1S,3N-bis-nucleophiles, [3+3] and [3+2] annulations have been established to allow rapid access to 1,3-thiazin-4-ones
Process for the preparation of aromatic thiocarboxylic acid amides
申请人:Hoechst Aktiengesellschaft
公开号:US04008264A1
公开(公告)日:1977-02-15
Aromatic thiocarboxylic acid amides are prepared by reaction of aromatic hydrocarbons with hydrogen thiocyanate or a salt of thiocyanic acid in at least 90% hydrofluoric acid. The reaction can be carried out in one single operation without the use of a Lewis acid or another catalyst. The thiocarboxylic acid amides obtained are known from the literature and serve as preliminary products for the preparation of nitriles, amides, carboxylic acids, heterocyclic compounds and the manufacture of plant protecting agents and pharmaceuticals.