A facile domino protocol for the regioselective synthesis and discovery of novel 2-amino-5-arylthieno-[2,3-b]thiophenes as antimycobacterial agents
作者:Kamaraj Balamurugan、Subbu Perumal、Aaramadaka Sunil Kumar Reddy、Perumal Yogeeswari、Dharmarajan Sriram
DOI:10.1016/j.tetlet.2009.08.085
日期:2009.11
2-amino-5-arylthieno[2,3-b]thiophenes has been synthesized regioselectively from the reaction of 5-aryldihydro-3(2H)-thiophenones with ethyl cyanoacetate/malononitrile and sulfur powder in the presence of morpholine under thermal as well as microwave irradiation conditions. This transformation presumably occurs via domino Gewald reaction–dehydrogenation sequence. The 2-amino-5-arylthieno[2,3-b]thiophenes were
在2-甲基苯甲酸酯存在下,由5-芳基二氢-3(2 H)-噻吩酮与氰基乙酸乙酯/丙二腈和硫粉的反应区域选择性合成了一系列新型的2-氨基-5-芳基噻吩并[2,3- b ]噻吩。热和微波照射条件下的吗啉。这种转变大概是通过多米诺骨牌Gewald反应-脱氢序列发生的。评价了2-氨基-5-芳基噻吩并[2,3- b ]噻吩在体外对结核分枝杆菌H37Rv(MTB)和耐多药结核分枝杆菌(MDR-TB)的活性。在筛选出的12种化合物中,乙基2-氨基-5-(1-萘基)噻吩并[2,3- b发现噻吩-3-羧酸盐是最具活性的化合物,其针对MTB和MDR-TB的MIC为1.1μM。