6-Nitrobenzimidazole derivatives: Potential phosphodiesterase inhibitors: Synthesis and structure–activity relationship
摘要:
6-Nitrobenzimidazole derivatives (1-30) synthesized and their phosphodiesterase inhibitory activities determined. Out of thirty tested compounds, ten showed a varying degrees of phosphodiesterase inhibition with IC50 values between 1.5 +/- 0.043 and 294.0 +/- 16.7 mu M. Compounds 30 (IC50 = 1.5 +/- 0.043 mu M), 1 (IC50 = 2.4 +/- 0.049 mu M), 11 (IC50 = 5.7 +/- 0.113 mu M), 13 (IC50 = 6.4 +/- 0.148 mu M), 14 (IC50 = 10.5 +/- 0.51 mu M), 9 (IC50 = 11.49 +/- 0.08 mu M), 3 (IC50 = 63.1 +/- 1.48 mu M), 10 (IC50 = 120.0 +/- 4.47 mu M), and 6 (IC50 = 153.2 +/- 5.6 mu M) showed excellent phosphodiesterase inhibitory activity, much superior to the standard EDTA (IC50 = 274 +/- 0.007 mu M), and thus are potential molecules for the development of a new class of phosphodiesterase inhibitors. Astructure-activity relationship is evaluated. All compounds are characterized by spectroscopic parameters (C) 2011 Elsevier Ltd. All rights reserved.
In the present study, new 4-(1H-benzimidazol-2-yl)-benzene-1,3-diols, modified in both rings, have been synthesized and their efficacies as acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) inhibitors have been determined. The modified Ellman's spectrophotometric method was applied for the biological evaluation. The compounds showed strong (IC₅₀ 80-90 nM) AChE and moderate (IC₅₀ 5-0.2 µM)
6-Nitrobenzimidazole derivatives (1-30) synthesized and their phosphodiesterase inhibitory activities determined. Out of thirty tested compounds, ten showed a varying degrees of phosphodiesterase inhibition with IC50 values between 1.5 +/- 0.043 and 294.0 +/- 16.7 mu M. Compounds 30 (IC50 = 1.5 +/- 0.043 mu M), 1 (IC50 = 2.4 +/- 0.049 mu M), 11 (IC50 = 5.7 +/- 0.113 mu M), 13 (IC50 = 6.4 +/- 0.148 mu M), 14 (IC50 = 10.5 +/- 0.51 mu M), 9 (IC50 = 11.49 +/- 0.08 mu M), 3 (IC50 = 63.1 +/- 1.48 mu M), 10 (IC50 = 120.0 +/- 4.47 mu M), and 6 (IC50 = 153.2 +/- 5.6 mu M) showed excellent phosphodiesterase inhibitory activity, much superior to the standard EDTA (IC50 = 274 +/- 0.007 mu M), and thus are potential molecules for the development of a new class of phosphodiesterase inhibitors. Astructure-activity relationship is evaluated. All compounds are characterized by spectroscopic parameters (C) 2011 Elsevier Ltd. All rights reserved.