A simple and efficient copper-catalyzed monofluoromethylation of 8-aminoquinolines with 2-bromo-2-fluoroacetate has been described with HPO(OMe)2 (dimethyl phosphonate) as reductant. The reaction tolerates a variety of quinoline amides and monofluoroalkyl bromides. Significant advantages of this protocol include synthetic convenience and high reaction efficiency.
A copper‐catalyzed remoteC−Hamination of 8‐aminoquinoline scaffolds on the C5 position is described. The protocol employs commercially available N‐fluorobenzenesulfonimide (NFSI) as the amination reagent and shows broad substrate scope, providing various 5‐aminated quinolines in moderate to excellent yields under mild conditions. These reactions feature complete regioselectivity, operational simplicity
Synthesis of ortho-arylated/benzylated arylacetamide derivatives: Pd(OAc)2-catalyzed bidentate ligand-aided arylation and benzylation of the γ-CH bond of arylacetamides
作者:Narendra Bisht、Srinivasarao Arulananda Babu
DOI:10.1016/j.tet.2016.08.026
日期:2016.9
of the arylacetamide systems. The arylation and benzylation of arylacetamides were successful; however, the alkylation and acetoxylation/hydroxylation of arylacetamides were not successful. Various ligands were screened to substantiate the need for the bidentateligand in the arylation/benzylation of arylacetamides, and 8-aminoquinoline was found to be the best bidentateligand. Several substituted
Phosphothreonine as a Catalytic Residue in Peptide-Mediated Asymmetric Transfer Hydrogenations of 8-Aminoquinolines
作者:Christopher R. Shugrue、Scott J. Miller
DOI:10.1002/anie.201505898
日期:2015.9.14
Phosphothreonine (pThr) was found to constitute a new class of chiral phosphoric acid (CPA) catalyst upon insertion into peptides. To demonstrate the potential of these phosphopeptides as asymmetric catalysts, enantioselective transferhydrogenations of a previously underexplored substrate class for CPA‐catalyzed reductions were carried out. pThr‐containing peptides lead to the observation of enantioselectivities