Regioselective and Stereospecific Rhodium-Catalyzed Allylic Cyanomethylation with an Acetonitrile Equivalent: Construction of Acyclic β-Quaternary Stereogenic Nitriles
作者:Mai-Jan Tom、P. Andrew Evans
DOI:10.1021/jacs.0c02316
日期:2020.7.15
A highlyregioselective and stereospecific rhodium-catalyzed cyanomethylation of tertiary allyliccarbonates for the construction of acyclic β-quaternary stereogenic nitriles is described. This protocol represents the first example of a metal-catalyzed allylicsubstitution reaction using a triorganosilyl-stabilized acetonitrile anion, which permits access to several carbonyl derivatives that are challenging
Samarium(II) Iodide-Mediated Intramolecular Conjugate Additions of α,β-Unsaturated Lactones
作者:Gary A. Molander、David J. St. Jean
DOI:10.1021/jo0255936
日期:2002.5.1
promote intramolecular conjugate additions of alkyl halides onto alpha,beta-unsaturated lactones. This process has been shown to be applicable to a number of alpha,beta-unsaturated lactones, including tetrasubstituted olefins, and has been demonstrated to be quite general for the formation of saturated bicyclic and tricyclic lactones. The method presented herein provides a mild, efficient process to form
7,8-Bicyclic-chroman derivatives of Formula I:
wherein the substituents are defined as in the specification or the pharmaceutically acceptable salts thereof, are disclosed. They are useful for the treatment of inflammatory disorders, neurodegenerative disorders and/or mitochondrial disorders. They are also useful in the manufacture of pharmaceutical formulations for the treatment of such conditions.
7,8-Bicyclic-chroman derivatives of Formula I:
wherein the substituents are defined as in the specification or the pharmaceutically acceptable salts thereof, are disclosed. They are useful for the treatment of inflammatory disorders, neurodegenerative disorders and/or mitochondrial disorders. They are also useful in the manufacture of pharmaceutical formulations for the treatment of such conditions.
7,8-Bicyclic-chroman derivatives of Formula I:
wherein the substituents are defined as in the specification or the pharmaceutically acceptable salts thereof, are disclosed. They are useful for the treatment of inflammatory disorders, neurodegenerative disorders and/or mitochondrial disorders. They are also useful in the manufacture of pharmaceutical formulations for the treatment of such conditions.