Platinum-catalyzed hydroarylation of alkynes was applied to thiophenes. Reaction of thiophenes with ethyl propiolate in trifluoroacetic acid in the presence of a K2PtCl4/AgOTf catalyst gave bis(substituted thienyl)propionates in good yields. The same Pt-catalyzed reaction with propiolic acid proceeded efficiently to provide bis(substituted thienyl)propionic acids in high yields.
铂催化的
炔烃氢芳构化反应被应用于
噻吩。
噻吩与
丙烯酸乙酯在三
氟醋酸中,在K2PtCl4/AgOTf催化剂存在下反应,生成了产率良好的双取代
噻吩丙酸酯。同样的
铂催化反应与
丙烯酸高效进行,提供了高产率的双取代
噻吩丙酸。