3-Aryl-[1,2,4]triazino[4,3-a]benzimidazol-4(10H)-one: A Novel Template for the Design of Highly Selective A2B Adenosine Receptor Antagonists
摘要:
In an effort to identify novel ligands possessing high affinity and selectivity for the A(2B) AR subtype, we further investigated the class of 3-aryl[1,2,4]triazino[4,3-a]benzimidazol-4(10H)-ones V, previously disclosed by us as selective A(1) AR antagonists. Preliminary assays on a number of triazinobenzimidazoles derived from our "in-house" collection revealed that all the derivatives selected showed significant affinity at A(2B) AR, no affinity at A(3) AR, and various degrees of selectivity toward A(1) and A(2A) ARs. Investigation of a new series featuring modified substituents at the 10-position (4'-chlorophenyl or phenylethyl groups), and a chlorine atom at the 7-position (X) of the triazinobenzimidazole nucleus, yielded highly potent and selective A(2B) AR antagonists. The presence of a pendant 3-phenyl ring appears to hamper the interaction with A(2A) AR, conferring high A(2B)/A(2A) AR selectivity. Derivative 13 (X = Cl, R = C6H5) is the most potent and selective compound, with an IC50 of 3.10 nM at A(2B) AR and no affinity at A(1), A(2A), and A(3) ARs.
Copper-catalyzed intramolecular N-arylation of ureas in water: a novel entry to benzoimidazolones
摘要:
The copper-catalyzed intramolecular N-arylation of 2-bromoarylureas performed in water leading to the benzo[d]imidazolone framework is reported. The scope of the methodology presented herein proved to be broad and afforded a significant number of benzoimidazolones in good to excellent yields. The reported protocol is based on the use of Cut and TMEDA acting both as the ligand and as the base in a water solution, which allows for the easy separation of the catalyst containing aqueous phase from the products by simple extraction. Additionally, the N- versus O-arylation competitive processes are also discussed. (c) 2008 Elsevier Ltd. All rights reserved.
A selenium‐catalyzed carbonylative reaction for the synthesis of 2‐benzimidazolones from 2‐nitroanilines has been developed. In this strategy, to avoid the usage of toxic CO gas, TFBen (benzene‐1,3,5‐triyl triformate) was used as a solid and stable CO precursor, and a variety of desired 2‐benzimidazolones were produced in moderate to excellent yields.
Discovery of novel, orally available benzimidazoles as melanin concentrating hormone receptor 1 (MCHR1) antagonists
作者:Pradip K. Sasmal、Sanjita Sasmal、P. Tirumala Rao、B. Venkatesham、M. Roshaiah、Chandrasekhar Abbineni、Ish Khanna、Vikram P. Jadhav、J. Suresh、Rashmi Talwar、Syed Muzeeb、Jean-Marie Receveur、Thomas M. Frimurer、Øystein Rist、Lisbeth Elster、Thomas Högberg
DOI:10.1016/j.bmcl.2010.07.086
日期:2010.9
Melanin concentrating hormone (MCH) is an important mediator of energy homeostasis and plays role in several disorders such as obesity, stress, depression and anxiety. The synthesis and biological evaluation of novel benzimidazole derivatives as MCHR1 antagonists are described. The in vivo proof of principle for weight loss with a lead compound from this series is exemplified. (c) 2010 Elsevier Ltd. All rights reserved.
FUSED CYCLIC UREA DERIVATIVES AS CRHR2 ANTAGONIST
申请人:RaQualia Pharma Inc.
公开号:US20210078975A1
公开(公告)日:2021-03-18
The present invention relates to fused cyclic urea derivatives which have antagonistic activities against CRHR1 and/or CRHR2, and which are useful in the treatment or prevention of disorders and diseases in which CRHR1 and/or CRHR2 is involved. The invention also relates to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which CRHR1 and/or CRHR2 is involved.