Background: A series of eighteen 2-Oxo-N-substituted phenyl- 2H-chromene-3- carboxamide analogues has been evaluated for HIV-1 integrase (IN) inhibition.

Methods: The derivatives were synthesized via a two-step pathway commencing with 2- hydroxybenzaldehyde and diethyl malonate followed by hydrolysis of ester and coupling with various aromatic amines. The HIV-1 IN inhibitory potential of these compounds has been studied relative to dolutegravir, a known HIV-1 IN inhibitor using a standard available kit.

Results: Six molecules (compounds 13h, 13i, 13l, 13p to 13r) showed significant inhibition of HIV- 1 integrase 3′-strand transfer with IC50 values less than 1.7 μM. The presence of chromene-3- carboxamide motif was shown to be crucial for the enzymatic activity. In addition, molecular modelling studies were also done to justify the IN inhibition and in vitro-in silico correlation was drawn.

Conclusion: However, these compounds did not show HIV-1 and HIV-2 inhibition below their cytotoxic concentration indicating that these compounds cannot be taken further for anti-HIV activity as such and require structural modification.

背景：已经评估了一系列18个2-氧-N-取代的苯基-2H-色烯-3-羧酰胺类似物对HIV-1整合酶（IN）的抑制作用。

方法：衍生物是通过两步途径从2-羟基苯甲醛和丙二酸二乙酯开始合成，然后将酯水解并与各种芳香胺偶联。已使用标准可用试剂盒相对于已知的HIV-1 IN抑制剂dolutegravir研究了这些化合物的HIV-1 IN抑制潜力。

结果：六个分子（化合物13h，13i，13l，13p至13r）显示出对HIV-1整合酶3'链转移的显着抑制作用，IC50值小于1.7μM。苯甲基-3-羧酰胺基序的存在对酶活性至关重要。此外，还进行了分子建模研究以证明IN抑制的合理性，并得出了体外-计算机相关性。

结论：然而，这些化合物在其细胞毒性浓度以下均未显示HIV-1和HIV-2抑制作用，表明这些化合物无法进一步用于抗HIV活性，因此需要进行结构修饰。