(Benzo[4, 5]cyclohepta[l, 2-b]thiophen-4-ylidene)acetic Acids: Novel Non-ulcerogenic Antiinflammatory Agents
作者:Pietro Bollinger、Philip Cooper、Hans U. Gubler、Albert Leutwiler、Trevor Payne
DOI:10.1002/hlca.19900730507
日期:1990.8.8
order to prepare derivatives with a wide variety of substituents in the aromatic part of the molecule, a new synthesis of the key intermediates 9a-g was developed starting from thiophene-3-carboxylic acid (11) and substituted benzyl bromides. The conversion of 9a-g to 10a-g follows a known procedure. Ketones 10a-g, on reaction with alkyl (dialkoxy-phosphoryl)acetate, followed by isomer separation and
已经发现化合物(Z)-8a显示出令人感兴趣的抗炎活性。为了制备在分子的芳族部分具有多种取代基的衍生物,从噻吩-3-羧酸(11)和取代的苄基溴开始,开发了关键中间体9a-g的新合成方法。9a-g到10a-g的转化遵循已知程序。酮10a-g与(二烷氧基-磷酰基)乙酸烷基酯反应,然后进行异构体分离和碱性酯水解,得到所需的衍生物(Z)-8a-g和(E)-8a-g。生物学上最有趣的化合物(Z)-8a目前正在临床试验中。