Synthetic Applications of Pd(II)-Catalyzed C−H Carboxylation and Mechanistic Insights: Expedient Routes to Anthranilic Acids, Oxazolinones, and Quinazolinones
作者:Ramesh Giri、Jonathan K. Lam、Jin-Quan Yu
DOI:10.1021/ja9077705
日期:2010.1.20
carbon monoxide is discussed. Identification of two key intermediates, a mixed anhydride and benzoxazinone formed by reductive elimination from organometallic Ar(CO)Pd(II)-OTs species, provides mechanistic evidence for a dual-reaction pathway.
The embodiments provide compounds of the general Formulae I, II, III, IV, or V as well as compositions, including pharmaceutical compositions, comprising a subject compound. The embodiments further provide treatment methods, including methods of treating a hepatitis C virus infection and methods of treating liver fibrosis, the methods generally involving administering to an individual in need thereof an effective amount of a subject compound or composition.
Efficient construction of 3-substituted-quinazolin-4(3H)-ones and theoretical investigation on the reaction pathways
作者:Xinyun Zhao、Juanfeng Lu、Lamei Wu、Xi Chen
DOI:10.1080/10426507.2017.1322085
日期:2017.9.2
phenyl- quinazolin-4(3H)-ones from 2-acetamidobenzoic acid, arylamines, arylhydrazines and arylacylhydrazines. Quinazolin-4(3H)-ones were obtained in good to excellent yields (85–98%) using dropwise POCl3 as a condensing agent in acetonitrile. Theoretical calculations were performed to explore the competition reaction pathways and the corresponding free energy profiles for the reaction of 2-acetamido-4-methyl-benzoic
Chroman compounds and derivatives of Formula I are useful inhibitors of TRPM8. Such compounds are useful in treating a number of TRPM8 mediated disorders and conditions and may be used to prepare medicaments and pharmaceutical compositions useful for treating such disorders and conditions. Examples of such disorders include, but are not limited to, migraines and neuropathic pain. Compounds of Formula I have the following structure:
where the definitions of the variables are provided herein.
A novel method for use in the decarboxylations of aromatic carboxylic acids, catalyzed by a cationic Ir/bisphosphine complex, is described, and the reactions proceed smoothly, affording various arenes (in >99% yields). Additionally, this system is applicable in consecutive C−C bond and C−F bond formation, indicating the potential synthetic value of the reaction.