Rhodium-Catalyzed Synthesis of α,β-Unsaturated Ketones through Sequential C–C Coupling and Redox Isomerization
作者:Hong-Shuang Li、Guili Guo、Rui-Ze Zhang、Fei Li
DOI:10.1021/acs.orglett.8b02190
日期:2018.8.17
A novel Rh(I)-catalyzed sequential C–C coupling and redox isomerization between allylicalcohols and 1,3-dienes has been accomplished. This versatile protocol provides expeditious access to a broad range of polysubstituted α,β-unsaturatedketones with excellent atom economy and regioselectivity.
Selective Oxidation of Benzylic and Allylic Alcohols Using Mn(OAc)<sub>3</sub>/Catalytic 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone
作者:Casey C. Cosner、Pablo J. Cabrera、Katherine M. Byrd、Asia M. Adams Thomas、Paul Helquist
DOI:10.1021/ol200441g
日期:2011.4.15
A practical, chemoselectiveoxidation of alcohols employing catalytic quantities of DDQ as the oxidant and Mn(OAc)3 as the co-oxidant is described. Electron-rich benzylicalcohols are oxidized efficiently to their corresponding carbonyls, but less electron-rich benzylicalcohols remain unchanged. Allylicalcohols are rapidly oxidized to their corresponding aldehyde or ketone counterparts in high yields