Biological Evaluation of Chiral Amides Synthesized from Diacetyl-L-tartaric Acid and Aromatic Amines
作者:Mahrukh Malik、Sher Wali Khan、Muhammad Arfan、Javid Hussain Zaidi、Asghari Bano、Faizan Ullah
DOI:10.14233/ajchem.2013.12833
日期:——
L-Tartaric acid is chiral compound and commercially available was conveniently converted into diacetyl-L-tartaric acid anhydride. Diacetyl-L-tartaric acid anhydride was then made to form half ester of diacetyl-L-tartaric acid anhydride which was then reacted with substituted anilines to yield respected chiral amides. These chiral amides were further purified and were characterized by using 1H NMR. The compound E11 [methyl-2,3-diacetoxy-4-oxo-4-(2’- methoxyphenylamino)butanoate] showed greater antibacterial activity against Staphylococcus aureus and Klebsiella pneumoniae. However, maximum antifungal activity was recorded for E3 [methyl-2, 3-diacetoxy-4-oxo-4-(4’-bromophenyl amino)butanoate]. The compounds E2 [methyl-2,3-diacetoxy-4-oxo-4-(2’-bromophenyl amino)butanoate] and E3 completely inhibited the germination of canola seeds, whereas, the compounds E1 [methyl-2,3- diacetoxy-4-oxo-4-(4’-methyl phenyl amino)butanoate] and E11 [methyl-2,3-diacetoxy-4-oxo- 4-(2’-methoxyphenylamino)butanoate] caused 40 % inhibition of seed germination.
L-酒石酸是手性化合物,市售可方便地转化为二乙酰基-L-酒石酸酐。然后使二乙酰基-L-酒石酸酐形成二乙酰基-L-酒石酸酐的半酯,然后将其与取代的苯胺反应生成相关的手性酰胺。这些手性酰胺被进一步纯化并通过 1 H NMR 进行表征。化合物E11[甲基-2,3-二乙酰氧基-4-氧代-4-(2'-甲氧基苯氨基)丁酸酯]对金黄色葡萄球菌和肺炎克雷伯菌表现出更强的抗菌活性。然而,E3 [甲基-2, 3-二乙酰氧基-4-氧代-4-(4'-溴苯基氨基)丁酸酯] 记录了最大的抗真菌活性。化合物E2[甲基-2,3-二乙酰氧基-4-氧代-4-(2'-溴苯基氨基)丁酸酯]和E3完全抑制油菜种子的发芽,而化合物E1[甲基-2,3-二乙酰氧基] -4-氧代-4-(4'-甲基苯基氨基)丁酸酯]和E11[甲基-2,3-二乙酰氧基-4-氧代-4-(2'-甲氧基苯基氨基)丁酸酯]对种子发芽造成40%的抑制。