In the studied a series novel of lazabemide derivatives were designed, synthesized and evaluated as inhibitors of monoamine oxidase (MAO-A or MAO-B). These compounds used lazabemide as the lead compound, and the chemistry structures were modified by used the bioisostere and modification of compound with alkyl principle. The two types of inhibitors (inhibition of MAO-A and inhibition of MAO-B) were screened by inhibition activity of MAO. In vitro experiments showed that compounds 3a, 3d and 3f had intensity inhibition the biological activity of MAO-A, while compounds 3i and 3m had intensity inhibition the biological activity of MAO-B. It could be seen from the data of inhibition activity experiments in vitro, that the compound 3d was IC₅₀ = 3.12 ± 0.05 μmol/mL of MAO-A and compound 3m was IC₅₀ = 5.04 ± 0.06 μmol/mL. In vivo inhibition activity experiments were conducted to evaluate the inhibitory activity of compounds 3a, 3d, 3f, 3i and 3m by detecting the contents of 5-HT, NE, DA and activity of MAO-A and MAO-B in plasma and brain tissue. In vivo inhibition activity evaluation results showed that the compounds 3a, 3d, 3f, 3i and 3m had increased the contents of 5-HT, NE and DA in plasma and brain tissues. Meanwhile, the determination results activity of MAO in plasma and brain tissue showed that the compounds 3a, 3d, and 3f had a significant inhibitory effect on the activity of MAO-A, while the compounds 3i and 3m showed inhibitory effect on the activity of MAO-B. This study provided a new inhibitors for inhibiting of MAO activity.

在研究中，设计，合成和评估了一系列新的lazabemide衍生物作为单胺氧化酶（MAO-A或MAO-B）的抑制剂。这些化合物以拉沙贝米为先导化合物，并通过对烷基进行化合物的生物等排和修饰，对化学结构进行了修饰。通过对MAO的抑制活性来筛选两种抑制剂（对MAO-A的抑制和对MAO-B的抑制）。体外实验表明，化合物3a，3d和3f具有抑制MAO-A生物学活性的强度，而化合物3i和3m具有强度抑制MAO-B的生物学活性。从体外抑制活性实验的数据可以看出，化合物3d为IC ₅₀  ＝ 3.12±0.05μmol/ mL的MAO-A，化合物3m为IC ₅₀  ＝ 5.04±0.06μmol/ mL。通过检测血浆和脑组织中5-HT，NE，DA的含量以及MAO-A和MAO-B的活性，进行体内抑制活性实验以评估化合物3a，3d，3f，3i和3m的抑制活性。。体内抑制活性评估结果表明，化合物3a，3d，3f，3i和3m增加了血浆和脑组织中5-HT，NE和DA的含量。同时，血浆和脑组织中MAO的测定结果活性表明化合物3a，3d和3f对MAO-A的活性具有明显的抑制作用，而化合物3i和3m则对MAO的活性具有抑制作用。 -B 该研究提供了一种抑制MAO活性的新抑制剂。