Easy α-alkylation of ketones with alcohols through a hydrogen autotransfer process catalyzed by RuCl2(DMSO)4
作者:Ricardo Martínez、Diego J. Ramón、Miguel Yus
DOI:10.1016/j.tet.2006.07.013
日期:2006.9
indicate that the process goes through the oxidation of the alcohols with ruthenium (after a previous deprotonation) to yield the corresponding aldehyde and a ruthenium hydride intermediate. In turn, the aldehyde suffers a classical aldol reaction with the starting ketone to form the corresponding α,β-unsaturated ketone, which finally is reduced through a Michael-typeaddition by the aforementioned ruthenium
New Second-Order Nonlinear Optical Materials with a Cutoff Wavelength of 350 nm. 3-Benzylidene-D-camphor Derivatives
作者:Jun Kawamata、Kuon Inoue
DOI:10.1246/cl.1993.921
日期:1993.6
A series of 3-benzylidene-d-camphor derivatives has been synthesized in order to examine the second-harmonic generation (SHG) efficiency along with the transparent wavelength region. Through reflection powder measurement, 3-cinnamylidene-d-camphor having a cutoff wavelength of 350 nm, shows the efficiency 10 times as large as that of urea.
Palladium-Catalyzed Late-Stage Direct Arene Cyanation
作者:Da Zhao、Peng Xu、Tobias Ritter
DOI:10.1016/j.chempr.2018.09.027
日期:2019.1
Methods for direct benzonitrile synthesis are sparse, despite the versatility of cyano groups in organic synthesis and the importance of benzonitriles for the dye, agrochemical, and pharmaceutical industries. We report the first general late-stage aryl C–H cyanation with broad substrate scope and functional-group tolerance. The reaction is enabled by a dual-ligand combination of quinoxaline and an
Immobilization and Continuous Recycling of Photoredox Catalysts in Ionic Liquids for Applications in Batch Reactions and Flow Systems: Catalytic Alkene Isomerization by Using Visible Light
作者:David C. Fabry、Meria A. Ronge、Magnus Rueping
DOI:10.1002/chem.201406653
日期:2015.3.27
presented. A variety of (Z)‐alkenes can be prepared in the presence of visible light. A new reaction system allows an easy and efficient scale‐up, as well as a continuous flowprocess in which the photocatalyst is immobilized in an ionicliquid and continuously recycled by simple phase separation.