New telmisartan-derived PPARγ agonists: Impact of the 3D-binding mode on the pharmacological profile
摘要:
In previous studies, the 4'-((2-propyl-1H-benzo[d]imidazol-1-yemethyl)-[1,1'-biphenyl]-2-carboxylic acid was identified as pharmacophoric core for PPAR gamma activation. In this structure-activity relationship study the C2-alkyl chain was elongated and the 2-COOH group was changed to a carbamide/carbonitrile or shifted to the 3- or 4-position. Furthermore, the benzo[d]imidazole was exchanged by 2,3dihydrobenzo[d]thiazole or 1H-indole. C2-propyl derivatives showed the profile of partial agonists, while elongation of the C2-chain to that of an n-heptyl group or a 4-COOH shift changed the pharmacological profile to that of a potent full agonist. This finding can be explained by binding to the LBD in different ligand conformations. Two anchoring points (Tyr473 and Arg288) exist in the LBD, which have to be contacted to achieve receptor activation. In a crystal violet chemosensitivity assay using COS-7 cells and LNCaP cells expressing PPAR gamma only the carbamide derivatives influenced the cell growth, independently on the presence of the PPAR gamma. Therefore, receptor mediated cytotoxicity can be excluded. (C) 2016 Elsevier Masson SAS. All rights reserved.
A General Approach to Substituted Benzimidazoles and Benzoxazoles
<i>via</i>
Heterogeneous Palladium‐Catalyzed Hydrogen‐Transfer with Primary Amines
作者:Marianna Pizzetti、Elisa De Luca、Elena Petricci、Andrea Porcheddu、Maurizio Taddei
DOI:10.1002/adsc.201200253
日期:2012.9.17
employed. Primaryamines are the most suitable reagents for the atom economy of the overall process that resulted to be general as several different substitutedbenzimidazoles were obtained in good yield. Benzoxazoles can be also prepared starting from primaryamines and o‐aminophenol. The reaction is also highly selective as no (poly)‐alkylated phenylenediamines or cross‐contaminated benzimidazoles are
One-Pot Synthesis of Functionalized Benzimidazoles and 1H-Pyrimidines via Cascade Reactions of o-Aminoanilines or Naphthalene-1,8-diamine with Alkynes and p-Tolylsulfonyl Azide
作者:Yanguang Wang、Jin She、Zheng Jiang
DOI:10.1055/s-0029-1217515
日期:2009.7
A one-potsynthesis of functionalized benzimidazoles and 1H-pyrimidines via the cascadereactions of o-aminoanilines or naphthalene-1,8-diamine with terminal alkynes and p-tolylsulfonyl azide is reported. The protocol is efficient and general.
The Synthesis of Benzimidazoles and Quinoxalines from Aromatic Diamines and Alcohols by Iridium-Catalyzed Acceptorless Dehydrogenative Alkylation
作者:Toni Hille、Torsten Irrgang、Rhett Kempe
DOI:10.1002/chem.201400400
日期:2014.5.5
N‐heteroaromatics with many applications in pharmaceutical and chemical industry. Here, the synthesis of both classes of compounds starting from aromatic diamines and alcohols (benzimidazoles) or diols (quinoxalines) is reported. The reactions proceed through acceptorless dehydrogenative condensation steps. Water and two equivalents of hydrogen are liberated in the course of the reactions. An Ir complex stabilized
苯并咪唑和喹喔啉是重要的N-杂芳族化合物,在制药和化学工业中有许多应用。在此,报道了从芳族二胺和醇(苯并咪唑)或二醇(喹喔啉)开始的两类化合物的合成。反应通过无受体的脱氢缩合步骤进行。在反应过程中释放出水和两当量的氢。由三齿P ^ N ^ P配体N 2,N 6-双(二异丙基膦基)吡啶-2,6-二胺稳定的Ir配合物显示出两个反应的最高催化活性。
Synthesis, anti-proliferative activity, SAR study, and preliminary in vivo toxicity study of substituted N,N′-bis(arylmethyl)benzimidazolium salts against a panel of non-small cell lung cancer cell lines
作者:Kerri L. Shelton、Michael A. DeBord、Patrick O. Wagers、Marie R. Southerland、Travis M. Williams、Nikki K. Robishaw、Leah P. Shriver、Claire A. Tessier、Matthew J. Panzner、Wiley J. Youngs
DOI:10.1016/j.bmc.2016.11.009
日期:2017.1
zimidazolium salts have been synthesized and evaluated for their in vitro anti-cancer activity against select non-small cell lung cancercell lines to create a structure activityrelationship profile. The results indicate that hydrophobic substituents on the salts increase the overall anti-proliferativeactivity. Our data confirms that naphthylmethyl substituents at the nitrogen atoms (N1(N3)) and
An efficient metal-free aerobicoxidative C–N bond cleavage of tertiaryamines has been developed to construct N-heterocycles using molecular oxygen as the sole oxidant with high atom efficiency, in which all of the three alkyl groups in tertiaryamines can be utilized and transformed into N-heterocycles.