Studies on the Synthesis of New Antimicrobials. II. Syntheses of 3-(5-Nitro-2-thienyl) acrylic Acid Derivatives and their Some Antibacterial Activities
作者:Ryuichi Kimura、Takahiro Yabuuchi、Masakatsu Hisaki
DOI:10.1248/cpb.10.1232
日期:——
3-(5-Nitro-2-thienyl) acrylic acid was synthesized in good yield by direct nitration of 3-(2-thienyl) acrylic acid obtained from 2-thiophenecarboxaldehyde without proceeding through 5-nitro-2-thiophenecarboxaldehyde diacetate. By condensation of the acid with various amines, alcohols or phenols, its amide and ester derivatives were prepared. 2-Bromo-3-(5-nitro-2-thienyl) acrylic acid esters were also obtained by bromination of the corresponding esters. Antibacterial activity of these compounds was tested on some bacteria in vitro.
通过直接硝化由 2-噻吩甲醛得到的 3-(2-噻吩基)丙烯酸,而不经过 5-硝基-2-噻吩甲醛二乙酸酯,合成了 3-(5-硝基-2-噻吩基)丙烯酸,收率很高。通过该酸与各种胺、醇或酚的缩合,制备出了其酰胺和酯衍生物。通过对相应的酯进行溴化处理,还得到了 2-溴-3-(5-硝基-2-噻吩基)丙烯酸酯。对这些化合物的抗菌活性进行了体外测试。