Highly Practical Copper(I)/TEMPO Catalyst System for Chemoselective Aerobic Oxidation of Primary Alcohols
作者:Jessica M. Hoover、Shannon S. Stahl
DOI:10.1021/ja206230h
日期:2011.10.26
Aerobicoxidation reactions have been the focus of considerable attention, but their use in mainstream organic chemistry has been constrained by limitations in their synthetic scope and by practical factors, such as the use of pure O(2) as the oxidant or complex catalyst synthesis. Here, we report a new (bpy)Cu(I)/TEMPO catalyst system that enables efficient and selective aerobicoxidation of a broad
Rhodium catalysed carbonylation of homoallylic alcohols to spiropyrans bearing quaternary centres
作者:Beate Kitsos-Rzychon、Peter Eilbracht
DOI:10.1016/s0040-4020(98)00637-1
日期:1998.9
A convenient preparation of substituted spiropyrans via rhodiumcatalysed hydroformylation of homoallylic alcohols, followed by a condensation sequence to form hemiacetals and 2,2,3,3-tetraalkyl-4[H]-pyrans, is described.
Aerobic oxidation of 1,n- and 1,omega-diols with (ON)Ru(salon) 1 as the catalyst was found to give the corresponding lactols in almost quantitative yields. Furthermore, in the oxidation of 2,2-dimethylalkane-1,omega-diols, less sterically hindered omega-alcohols were found to be preferentially oxidized when (ON)Ru(salen) 6 was used as the catalyst. n-Decanol was preferentially oxidized in the presence of 2,2-dimethylpropanol also by using 6 as the catalyst. (C) 2002 Elsevier Science Ltd. All rights reserved.