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.