Novel structural hybrids of pyrazolobenzothiazines with benzimidazoles as cholinesterase inhibitors
作者:Sana Aslam、Sumera Zaib、Matloob Ahmad、John M. Gardiner、Aqeel Ahmad、Abdul Hameed、Norbert Furtmann、Michael Gütschow、Jürgen Bajorath、Jamshed Iqbal
DOI:10.1016/j.ejmech.2014.03.035
日期:2014.5
efficiently synthesized starting from saccharin sodium salt. Pyrazolo[4,3-c][1,2]benzothiazine scaffolds were N-arylated by using p-fluorobenzaldehyde, followed by the incorporation of a benzimidazole or similar ring systems by treatment with arylenediamines. These phenylene-connected hybrid compounds were investigated as potential inhibitors of acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE)
从糖精钠盐开始有效地合成了两个系列的新型基于吡唑并苯并噻嗪的杂化化合物。通过使用对氟苯甲醛对吡唑并[4,3- c ] [1,2]苯并噻嗪支架进行N-芳基化,然后通过亚芳基二胺处理引入苯并咪唑或类似的环系统。研究了这些与亚苯基连接的杂化化合物作为乙酰胆碱酯酶(AChE)和丁酰胆碱酯酶(BuChE)的潜在抑制剂。化合物12d和12k是最有效的AChE抑制剂,IC 50值分别为11和13 nM,而6j(IC 50 = 17 nM)被证明是最有效的BuChE抑制剂,对BuChE的选择性比AChE高。还对人的AChE和BuChE进行了分子对接研究,以表明可能的结合方式,其中抑制剂的延伸结构沿两种酶的活性位点排列。