In this work, a series of O-alkyl/arenyl/acyl substituted derivatives of 7-hydorxy-4-methyl-1-benzenpyran-2-one (3a-l) was synthesized. The parent compound 7-hydroxy-4-methyl-1-benzenpyran-2-one (1) was geared up by the coupling of resorcinol (a) with ethylacetoacetate (b) in the presence of conc. sulphuric acid. Further, O-substituted derivatives of parent compound were prepared by treating with different electrophiles (2a-l) using sodium hydride as base and DMF as a solvent. The structure of these synthesized compounds were characterized by IR, EI-MS and 1H NMR. These derivatives were also screened against a-chymotrypsin enzyme to check their enzyme inhibition activity. All the compounds displayed a-chymotrypsin activity to varying degree.
在本项工作中,合成了一系列7-羟基-4-甲基-1-苯并
吡喃-2-酮(3a-l)的O-烷基/芳基/酰基取代衍
生物。母体化合物7-羟基-4-甲基-1-苯并
吡喃-2-酮(1)通过
间苯二酚(a)与
乙酰乙酸乙酯(b)在浓
硫酸存在下的偶联反应制备而成。进一步地,通过使用氢化
钠作为碱和
DMF作为溶剂,将母体化合物用不同的亲电试剂(2a-l)处理,制备出O-取代衍
生物。这些合成化合物的结构通过IR、EI-MS和1H NMR进行了表征。这些衍
生物还针对α-胰凝乳
蛋白酶进行了酶抑制活性的筛选。所有化合物均展现出不同程度的α-胰凝乳
蛋白酶活性。