Kappa opioid receptor (KOR) is an important mediator of pain signaling and it is targeted for the treatment of various pains. Pharmacophore based mining of databases led to the identification of 2-aminobenzimidazole derivative as KOR agonists with selectivity over the other opioid receptors DOR and MOR. A short SAR exploration with the objective of identifying more polar and hence less brain penetrant agonists is described herewith. Modeling studies of the recently published structures of KOR, DOR and MOR are used to explain the receptor selectivity. The synthesis, biological evaluation and SAR of novel benzimidazole derivatives as KOR agonists are described. The in vivo proof of principle for anti-nociceptive effect with a lead compound from this series is exemplified. (C) 2014 Elsevier Ltd. All rights reserved.
PTSA catalyzed straightforward protocol for the synthesis of 2-(N-acyl)aminobenzimidazoles and 2-(N-acyl)aminobenzothiazoles in PEG
An efficient PTSA catalyzed synthesis of 2-(N-acyl)aminobenzimidazoles and 2-(N-acyl)aminobenzothiazoles has been described using S-ethylated-N-acylthioureas as substrates and polyethylene glycol as solvent. (C) 2014 Elsevier Ltd. All rights reserved.
Sridevi, G.; Rao, P. Jayaprasad; Reddy, K. Kondal, Synthetic Communications, 1989, vol. 19, # 5and6, p. 965 - 972
作者:Sridevi, G.、Rao, P. Jayaprasad、Reddy, K. Kondal
DOI:——
日期:——
RAO, P. JAYAPRASAD;REDDY, K. KONDAL, SYNTH. COMMUN., 18,(1988) N 16-17, C. 1995-2001