Add time:09/01/2019         Source:sciencedirect.com

In a wide research programme towards the study of piperidin-4-ones with efficient pharmacological effect, a new series of N-acyl r-2,c-6-bis(4-methoxyphenyl)-c-3,t-3-dimethylpiperidin-4-ones 2–5 are synthesized and characterized by IR spectra, 1H, 13C, DEPT - 135 and 2D (COSY and HSQC) NMR and mass spectra. The parent compound 1 prefers to exist in a chair conformation whereas the extracted coupling constant, chemical shifts and estimated dihedral angles show that the N-acyl piperdine-4-ones 2–5 prefer to exist in a distorted boat conformation B1 (with C2 and C5 in prow and stern positions) with coplanar orientation of NCO moiety. The existence of a fast NCO rotational equilibrium between the boat conformations B (I) and B (II) has also been observed. Anti bacterial activity of the above test compounds 1–5 is determined against pseudomonas sp. and salmonella sp. The antioxidant activities are determined by the ABTS, DPPH and superoxide assays. Furthermore, molecular docking studies have been carried out for the compounds 1–5 with target protein CHK1.

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