Discovery of oxazolo[4,5-b]pyridines and related heterocyclic analogs as novel SIRT1 activators
摘要:
SIRT1 is an NAD(+)-dependent protein deacetylase that appears to produce beneficial effects on metabolic parameters such as glucose and insulin homeostasis. Activation of SIRT1 by resveratrol ( 1) has been shown to modulate insulin resistance, increase mitochondrial content and prolong survival in lower organisms and in mice on a high fat diet. Herein, we describe the identification and SAR of a series of oxazolo[4,5-b]pyridines as novel small molecule activators of SIRT1 which are structurally unrelated to and more potent than resveratrol. (C) 2009 Published by Elsevier Ltd.
Synthesis of imidazo[4,5-<i>b</i>]- and [4,5-<i>c</i>]pyridines
作者:Richard W. Middleton、D. George Wibberley
DOI:10.1002/jhet.5570170824
日期:1980.12
2-Arylimidazo[4,5-b]- and [4,5-c]pyridines have been prepared by treatment of the appropriate 2,3- or 3,4-diaminopyridine with an aromatic carboxylic acid in the presence of polyphosphoric acid. Other derivatives have been prepared by similar cyclisation of diaminopyridines using triethyl orthoformate, urea, thiophosgene and thiourea and the properties of some N-oxides have been investigated. A number
通过在多磷酸存在下用芳族羧酸处理适当的2,3-或3,4-二氨基吡啶,可以制备2-Arylimidazoazo [4,5- b ]-和[4,5- c ]吡啶。使用原甲酸三乙酯,尿素,硫光气和硫脲,通过二氨基吡啶的类似环化反应,已经制备了其他衍生物,并且已经研究了一些N-氧化物的性质。已经筛选了许多芳基咪唑并吡啶的致突变性。
Eco-friendly and facile synthesis of 2-substituted-1H-imidazo[4,5-b]pyridine in aqueous medium by air oxidation
作者:Rajesh P. Kale、Mohammad U. Shaikh、Ganesh R. Jadhav、Charansingh H. Gill
DOI:10.1016/j.tetlet.2008.12.104
日期:2009.4
a new environmentally-benign, convenient, and facile methodology for the synthesis of 2-substituted-1H-imidazo[4,5-b]pyridine. The reaction of 2,3-diaminopyridine with substituted arylaldehydes in water under thermal conditions without the use of any oxidative reagent has been studied. The reaction has yielded 1H-imidazo[4,5-b]pyridine derivatives by an air oxidative cyclocondensation reaction in
我们报告了一种新的环境友好,方便,简便的方法合成2-取代-1 H-咪唑并[4,5- b ]吡啶。研究了2,3-二氨基吡啶与取代的芳基醛在水中在热条件下不使用任何氧化剂的反应。反应产生1 H-咪唑并[4,5- b吡啶衍生物通过空气氧化环缩合反应一步一步即可获得极佳的收率。此外,合成了一系列化合物,并通过熔点,EI-MS,NMR和IR工具对其进行了表征。为了比较,参考样品通过报道的方法制备。从经济和环境的角度来看,利用水性介质,容易的反应条件,分离和纯化使这种操作非常有趣。