Polymer-supported Oxone and tert-butyl hydroperoxide: new reagents for the epoxidation of α,β-unsaturated aldehydes and ketones
摘要:
Efficient, mild and selective epoxidation of alpha,beta-unsaturated aldehydes and ketones was performed using polyvinylpyrrolidone-supported Oxone (Oxone/PVP) and Bu(t)OOH/PVP.
An in-depth look at the effect of Lewis acid catalysts on Diels–Alder cycloadditions in ionic liquids
作者:Guadalupe Silvero、María José Arévalo、José Luis Bravo、Martín Ávalos、José Luis Jiménez、Ignacio López
DOI:10.1016/j.tet.2005.05.064
日期:2005.7
The present work explores in detail the Diels–Alderreaction between cyclopentadiene and a series of dienophiles, performed in an innovative medium such as an ionicliquid. The potential activation of differentLewisacid catalysts and their load effect when used in combination with this solvent have been explored, in order to settle the improvement on rates and selectivities.
Batch versus Flow Photochemistry: A Revealing Comparison of Yield and Productivity
作者:Luke D. Elliott、Jonathan P. Knowles、Paul J. Koovits、Katie G. Maskill、Michael J. Ralph、Guillaume Lejeune、Lee J. Edwards、Richard I. Robinson、Ian R. Clemens、Brian Cox、David D. Pascoe、Guido Koch、Martin Eberle、Malcolm B. Berry、Kevin I. Booker-Milburn
DOI:10.1002/chem.201404347
日期:2014.11.10
The use of flowphotochemistry and its apparent superiority over batch has been reported by a number of groups in recent years. To rigorously determine whether flow does indeed have an advantage over batch, a broad range of synthetic photochemical transformations were optimized in both reactor modes and their yields and productivities compared. Surprisingly, yields were essentially identical in all
Tricycloundecane Derivatives as Potential<i>N</i>-Methyl-<scp>D</scp>-aspartate (NMDA) Receptor and Voltage-Gated Calcium Channel Modulators
作者:Ayodeji O. Egunlusi、Sarel F. Malan、Jacques Joubert
DOI:10.1002/cmdc.201500072
日期:2015.7
excitotoxicity via N‐methyl‐D‐aspartate (NMDA) receptor stimulation and activation of voltage‐gated calciumchannels (VGCC) on neuronal cells are prominent. This has led to the development of polycyclic cage molecules such as NGP1‐01, which exhibit neuroprotective properties through NMDAreceptor and VGCC modulation. The medicinal potential of structurally related tricycloundecanes that are open‐cage or rearranged
Light induced activity switch in interfacial hydrogen-bond catalysis with photo sensitive metal oxides
作者:Fang Niu、Jin Zhai、Lei Jiang、Wei-Guo Song
DOI:10.1039/b908834b
日期:——
UV light switches on the catalytic activities of several metal oxides in hydrogen bond catalyzed reactions because of the changes in the concentration of the surface hydroxyl groups.