Combination of Metal-Catalyzed Cycloisomerizations and Biocatalysis in Aqueous Media: Asymmetric Construction of Chiral Alcohols, Lactones, and γ-Hydroxy-Carbonyl Compounds
作者:María J. Rodríguez-Álvarez、Nicolás Ríos-Lombardía、Sören Schumacher、David Pérez-Iglesias、Francisco Morís、Victorio Cadierno、Joaquín García-Álvarez、Javier González-Sabín
DOI:10.1021/acscatal.7b02183
日期:2017.11.3
The combination of the metal-catalyzed cycloisomerization of alkynes containing a tethered nucleophile as substituent in aqueousmedia (followed by the spontaneous hydrolysis, hydroalkoxylation, or aminolysis of the transiently formed five-membered heterocycles) with the subsequent enantioselective ketone bioreduction (mediated by KREDs) has been achieved. The overall transformations, which formally
Synthesis, characterization and antitubercular activities of novel pyrrolyl hydrazones and their Cu-complexes
作者:Shrinivas D. Joshi、Devendra Kumar、Sheshagiri R. Dixit、Nageshwar Tigadi、Uttam A. More、Christian Lherbet、Tejraj M. Aminabhavi、Kap Seung Yang
DOI:10.1016/j.ejmech.2016.05.025
日期:2016.10
Novel pyrrolyl hydrazones and their copper complexes have been synthesized and characterized using analytical and spectral techniques to show the tetrahedral geometry for Cu(II) complexes. Biological activities of hydrazones have been assessed to understand the role of metal ion on their biological activity and the effect of pyrrolyl hydrazones. In vitro antitubercularactivity against Mycobacterium
Highly Efficient and Versatile Synthesis of Lactams and <i>N</i>-Heterocycles via Al(OTf)<sub>3</sub>-Catalyzed Cascade Cyclization and Ionic Hydrogenation Reactions
The discovery and development of an efficient and versatile method for the synthesis of N-substituted lactams is described. Pyrrolindinones, piperidones, and structurally related heterocycles were formed by Al(OTf)3-catalyzed cascade cyclization and ionic hydrogenation reactions of corresponding nitrogen substituted ketoamides in good yields.