2-Amino- and 2-Alkylthio-4H-3,1-benzothiazin-4-ones: Synthesis, Interconversion and Enzyme Inhibitory Activities
作者:Hans-Georg Häcker、Florian Grundmann、Friederike Lohr、Philipp Ottersbach、Jing Zhou、Gregor Schnakenburg、Michael Gütschow
DOI:10.3390/molecules14010378
日期:——
The synthetic access to 2-sec-amino-4H-3,1-benzothiazin-4-ones 2 was explored. Compounds 2 were available from methyl 2-thioureidobenzoates 1, 2-thioureidobenzoic acids 3, and novel 2-thioureidobenzamides 6, respectively, under different conditions. 2-Alkylthio-4H-3,1-benzothiazin-4-ones 5 have been prepared from anthranilic acid following a two step route. Both, benzothiazinones 2 and 5 underwent ring cleavage reactions to produce thioureas 1 and 6, respectively. Twelve benzothiazinones were evaluated as inhibitors against a panel of eight proteases and esterases to identify one selective inhibitor of human cathepsin L, 2b, and one selective inhibitor of human leukocyte elastase, 5i.
2-sec-氨基金刚烷-4H-3,1-苯并噻嗪-4-酮的合成途径已被探索。化合物2可通过不同条件下,从甲基2-硫脲苄酯1、2-硫脲苯甲酸3和新型的2-硫脲苯甲酰胺6中得到。2-烷硫基-4H-3,1-苯并噻嗪-4-酮5则通过两步路线从邻氨基苯甲酸制备得到。苯并噻嗪酮2和5均在环裂解反应中分别生成硫脲1和6。对十二种苯并噻嗪酮进行了作为八种蛋白酶和酯酶抑制剂的评估,以识别出一种对人类组织蛋白酶L具有选择性抑制作用的2b和一种对人类白细胞弹性蛋白酶具有选择性抑制作用的5i。