Discovery of Potent and Orally Bioavailable GPR40 Full Agonists Bearing Thiophen-2-ylpropanoic Acid Scaffold
摘要:
The free fatty acid receptor GPR40 is predominantly expressed in pancreatic beta-cells and enhances insulin secretion in a glucose dependent manner. Therefore, GPR40 agonists are possible novel insulin secretagogues with reduced or no risk of hypoglycemia for the treatment of type 2 diabetes mellitus (T2DM). Chemically and structurally diverse GPR40 agonists with high safety are pursued for the clinical development of GPR40-based pharmacotherapeutics. Herein we report our design and discovery of a new chemotype of GPR40 agonists free of the typical phenylpropanoic acid scaffold. The thiophen-2-ylpropanoic acid containing GPR40 modulators functioned as full agonists with high-efficacy response (E-max) and reduced lipophilicity. Significantly, the lead compound in this series, (R)-7k, exhibited more potent in vitro glucose-stimulated insulin secretion and in vivo glucose-lowering effects (10 mg/kg, po) than the GPR40 partial agonist TAK-875, which was once in phase III clinical trials, and high selectivity over the relevant receptors GPR120 and PPAR gamma.
Gold-Catalyzed 1,2-Oxoarylations of Nitriles with Pyridine-Derived Oxides
摘要:
AbstractWe report the first success in the gold‐catalyzed oxoarylations of nitriles with pyridine‐derived N‐oxides using gold carbenes as initiators. These oxoarylations were also achieved satisfactorily in intermolecular three‐component oxidations, including diverse alkenyldiazo esters, nitriles, and pyridine‐based oxides.
Nickel-Catalyzed C(sp<sup>3</sup>)–H Functionalization of Benzyl Nitriles: Direct Michael Addition to Terminal Vinyl Ketones
作者:Ninghui Zhang、Chunli Zhang、Xiaoping Hu、Xin Xie、Yuanhong Liu
DOI:10.1021/acs.orglett.1c02074
日期:2021.8.6
An efficient nickel(0)-catalyzed addition of benzyl nitriles to terminal vinyl ketones via C(sp3)–H functionalization has been developed. The reaction provides a novel and efficient protocol for the synthesis of α-functionalized benzyl nitriles with a wide range of structural diversity under mild reaction conditions while obviating the use of a strong base. The work might be potentially useful toward
cyano/aldehyde group is described. It involves successive hetero- and benz-annulations in one pot via trans-oxo/aminopalladation onto alkyne, followed by 1,2-addition to cyano/aldehyde, providing a convenient synthesis of both naphtho[1,2-b]furans and benzo[g]indoles. The reaction constitutes a fast intramolecular assembly through several carbon–carbon and carbon–heteroatom bondformations taking place
描述了一种有效的钯(II)催化带有氰基/醛基的烯炔基的级联反应。它涉及在一个锅中通过反式-羰基/氨基palpalation到炔烃上的连续异环和苯环,然后将1,2-加成到氰基/醛中,从而方便地合成萘并[1,2- b ]呋喃和苯并[ g ]吲哚。该反应通过一个罐中发生的数个碳-碳和碳-杂原子键构成了一种快速的分子内组装。该反应操作简单,与一系列官能团相容并且本质上是原子经济的。
One-Pot Procedure for the Synthesis of Unsymmetrical Diarylalkynes
作者:René Severin、Jessica Reimer、Sven Doye
DOI:10.1021/jo100460v
日期:2010.5.21
Unsymmetrical diarylalkynes are accessible by a one-pot procedure from two different aryl halides and (trimethylsilyl)acetylene. The three-component coupling is initialized by a Pd/Cu-catalyzed Sonogashira coupling of an aryl halide with (trimethylsilyl)acetylene. After subsequent desilylation Ilk; formed aryl(trimethylsilyl)acetylene with aqueous potassium hydroxide, a second Sono-gashira coupling with an aryl iodide that does not require any additional Pd/Cu-catalyst gives access to an unsymmetrical diarylalkyne.
Synthesis of <i>ortho</i>-Diamino-Functionalized 1-Arylnaphthalenes through Nickel-Catalyzed Cyclization of Ynamide-Benzylnitriles with Organoboronic Acids
作者:Xiaoping Hu、Peizhuo Lv、Ninghui Zhang、Yuanhong Liu