Spiro[indene-1,4′-oxa-zolidinones] Synthesis via Rh(III)-Catalyzed Coupling of 4-Phenyl-1,3-oxazol-2(3<i>H</i>)-ones with Alkynes: A Redox-Neutral Approach
作者:Zhongsu Liu、Wenjing Zhang、Shan Guo、Jin Zhu
DOI:10.1021/acs.joc.9b01804
日期:2019.9.20
C-H activation synthesis of heterocyclic spiro[4,4]nonanes has persistently witnessed the use of additional stoichiometric transition-metal oxidant when employing C═C bond as the spiro ring closure site. Herein, we have addressed the issue by reporting a redox-neutral strategy for spiro[indene-1,4'-oxa-zolidinones] synthesis via Rh(III)-catalyzed coupling of 4-phenyl-1,3-oxazol-2(3H)-ones with alkynes
the sphingolipid family, a diversified class of bioactive molecules that mediate many biological processes ranging from cell structural integrity, signaling, and cell proliferation to cell death. In the effort to expand the structural diversity of the existing collection of AC inhibitors, a novelclass of substituted oxazol-2-one-3-carboxamides were designed and synthesized. Herein, we present the
The present invention provides a novel compound having a GPR40 receptor function modulating action, which is useful as an insulin secretagogue, a drug for the prophylaxis or treatment of diabetes and the like.
A compound represented by the formula (I)
wherein each symbol is as defined in the specification, a salt thereof and a prodrug thereof have unexpectedly superior GPR40 receptor agonist activity and also show superior properties as a pharmaceutical product, such as stability and the like. Thus, they can be safe and useful drugs for the prophylaxis or treatment of GPR40 receptor related conditions or diseases in mammals.
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-catalyzed metal-free hydrogenation of 2-oxazolones
作者:Guangyu Cui、Xiangqing Feng、Haifeng Du
DOI:10.1039/d2ob01950g
日期:——
A metal-free hydrogenation of 2-oxazolones was successfully realized by using 10 mol% of B(C6F5)3 as the catalyst, giving a variety of 2-oxazolidinones in 70–98% yields. An enamine to imine process was believed to be involved in this reaction.
以10 mol%的B(C 6 F 5 ) 3为催化剂,成功实现了2-恶唑酮的无金属加氢反应,得到多种2-恶唑烷酮,收率为70-98%。烯胺到亚胺的过程被认为参与了该反应。