Synthesis and biological evaluation of benzimidazole derivatives as potent AMP-activated protein kinase activators
摘要:
Design, synthesis and structure-activity relationships of beU:/AP/DTD501/BMC/4818nzimidazole derivatives as activators of the AMP-activated protein kinase (AMPK) are presented in this paper. AMPK is the central component of a protein kinase cascade that plays a key role in the regulation of energy balance. Once activated, AMPK initiates a series of responses that are aimed at restoring the energy balance of the cell and recent studies have indicated that AMPK plays an important role in regulation of the whole-body energy metabolism. The following study based on the lead compound S27847 involved modification of three regions of this compound. Preliminary structure activity relationships are being described. (c) 2006 Elsevier Ltd. All rights reserved.
for several biological targets. Formation by cyclodehydration from their monoacylated counterparts was shown to be strongly dependent upon the nature of the acyl group. In the case of a dicyclohexylmethyl group, cyclization was only observed in a p-toluenesulfonic acid/toluene mixture from the symmetrical diacylated precursor. Analysis of the mechanism was begun starting from mixed diacylated derivatives
Palladium(II)-Catalyzed Oxidative ortho-Arylation of 2-Phenylpyridines
作者:Chun Cai、Jie Feng、Guoping Lu、Meifang Lv
DOI:10.1055/s-0033-1339516
日期:——
A palladium(II)-catalyzedoxidative ortho-arylation of 2-phenylpyridines via direct C–H activation with aryl boric acids is described. The reaction could be conducted under mild conditions in the presence of Pd(OAc)2/Cu(OTf)2/TBHP system, and a variety of the azacyclic compounds bearing a biaryl unit were obtained with moderate to good yields.
描述了钯 (II) 催化的 2-苯基吡啶氧化邻位芳基化反应,通过使用芳基硼酸直接进行 C-H 活化。在Pd(OAc)2/Cu(OTf)2/TBHP体系存在下,该反应可以在温和的条件下进行,并以中等至良好的收率获得了多种带有联芳基单元的氮杂环化合物。
Hypervalent iodine promoted <i>ortho</i> diversification: 2-aryl benzimidazole, quinazoline and imidazopyridine as directing templates
作者:Moumita Saha、Asish R. Das
DOI:10.1039/c9ob02533b
日期:——
benzimidazole, quinazoline, and imidazopyridine is reported using hypervalent iodine as the key reagent. Acetoxy, aryl, iodide and nitro functional groups were introduced on the same substrate by simply shifting the reaction conditions in the presence of inorganic additives (Cs2CO3, I2, NaNO2) and the hypervalent iodine reagent (diacetoxyiodo)benzene (PIDA) underaerobicconditions. The combination
A Photochemical Intramolecular C–N Coupling Toward the Synthesis of Benzimidazole-Fused Phenanthridines
作者:Shyamal Kanti Bera、Palash J. Boruah、Shraddha Saraswati Parida、Amit K. Paul、Prasenjit Mal
DOI:10.1021/acs.joc.1c00871
日期:2021.7.16
direct photochemical dehydrogenative C–N coupling of unactivated C(sp2)–H and N(sp2)–H bonds. The catalysts or additive-free transformation of 2-([1,1′-biphenyl]-2-yl)-1H-benzo[d]imidazole to benzo[4,5]imidazo[1,2-f]phenanthridine was achieved at ∼350 nm of irradiation via ε-hydrogen abstraction. DFT calculations helped to understand that the N–H···π interaction was essential for the reaction to proceed
在此,我们报告了未活化的 C(sp 2 )-H 和 N(sp 2 )-H 键的直接光化学脱氢 C-N 偶联。2-([1,1'-联苯]-2-基) -1H-苯并[ d ]咪唑催化剂或无添加剂转化为苯并[4,5]咪唑并[1,2- f ]菲啶通过ε-氢提取在~350 nm的辐射下实现。DFT 计算有助于理解 N–H···π 相互作用对于反应以低于预期的能量进行是必不可少的。