“…Functionalized piperidines are found to constitute a very important core in numerous natural products (Desai et al, 1992;Pinder, 1992), synthetic pharmaceuticals (Breman et al, 2001;Watson et al, 2000), and a wide variety of biologically active compounds. In particular, 1,4-disubstituted piperidine scaffolds find useful applications as established drugs (Targum et al, 1995;Schotte et al,1996), and they exhibit a wide range of pharmacological activities including antibacterial (Zhou et al, 2007), antimalarial (Misra et al, 2009), anticonvulsant, anti-inflammatory (Bin et al, 2001), and enzyme inhibitory activity (Agrawal & Somani, 2009;Dekus et al, 2007). Moreover a large number of compounds bearing piperidine scaffold have entered into preclinical and clinical trials over the last few years (Kamei et al, 2005).…”