通过2,2,2-三氟乙醇作为反应溶剂的空前使用,通过4-羟基-苯酚的反应,以中等至极好的收率和高区域选择性提供了一种方便且便捷的途径,可对称地获得3,3-二取代的喹啉-2,4-二酮。在K 2 CO 3存在下,具有亲电试剂的2-喹诺酮类化合物,如甲基碘,以及苄基和烯丙基溴。需要氧化银(I)以增加甲基化的产率。
Efficient chemoselective alkylation of quinoline 2,4-diol derivatives in water
作者:Nafees Ahmed、Keyur G. Brahmbhatt、Inder P. Singh、Kamlesh K. Bhutani
DOI:10.1002/jhet.364
日期:2011.1
Synthesis of various C‐3‐dialkyl derivatives of quinoline 2,4‐diol was achieved by condensation of aniline or substituted anilines with diethyl malonate, followed by chemoselectivealkylation at C‐3 in water. The higher yields, easy work up and environmental compatible conditions are the main aspects of our method. J. Heterocyclic Chem., 2011.
Synthesis and anti-HIV activity of alkylated quinoline 2,4-diols
作者:Nafees Ahmed、Keyur G. Brahmbhatt、Sudeep Sabde、Debashis Mitra、Inder Pal Singh、Kamlesh K. Bhutani
DOI:10.1016/j.bmc.2010.03.015
日期:2010.4
Naturally occurring quinolone alkaloids, buchapine (1) and compound 2 were synthesized as reported in literature and evaluated for anti-HIV potential in human CD4+ T cell line CEM-GFP, infected with HIV-1(NL4.3) virus by p24 antigen capture ELISA assay. The compounds 1 and 2 showed potent inhibitory activity with IC50 value of 2.99 and 3.80 mu M, respectively. Further, 45 alkylated derivatives of quinoline 2,4-diol were synthesized and tested for anti-HIV potential in human CD4+ T cell line CEM-GFP. Among these, 13 derivatives have shown more than 60% inhibition. We have identified three most potent inhibitors 6, 9 and 23; compound 6 was found to be more potent than lead molecule 1 with IC50 value of 2.35 mu M and had better therapeutic index (26.64) as compared to AZT (23.07). Five derivatives 7, 19a, 19d, 21 and 24 have displayed good noticeable anti-HIV activity. All active compounds showed higher CC50 values which indicate that they have better therapeutic indices. (C) 2010 Elsevier Ltd. All rights reserved.
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