Hypervalent Iodine as a Terminal Oxidant in Wacker-Type Oxidation of Terminal Olefins to Methyl Ketones
作者:Dipali A. Chaudhari、Rodney A. Fernandes
DOI:10.1021/acs.joc.6b00137
日期:2016.3.4
the Wacker process for C═O bond formation in terminal olefins can be initiated by a combination of the Pd(II) and hypervalentiodinereagent, Dess–Martin periodinane to generate methyl ketones. This operationally simple and scalable method offers Markovnikov selectivity, has good functional group compatibility, and is mild and high yielding.
Iron(III) Sulfate as Terminal Oxidant in the Synthesis of Methyl Ketones via Wacker Oxidation
作者:Rodney A. Fernandes、Dipali A. Chaudhari
DOI:10.1021/jo500921j
日期:2014.6.20
An efficient and environmentally benign method using Fe(III) sulfate as a terminal oxidant in the synthesis of methylketones from terminal olefins via the Wacker process is developed. The methodology offers high selectivity for a Markonikov product, shows good functional group compatibility, involves mild reaction conditions, and is operationally simple. Fe2(SO4)3 is the sole terminal oxidant in this
Palladium(II)-catalyzed dicarboxymethylation of chiral allylic alcohols: chirality transfer affording optically active diesters containing three contiguous chiral centers
作者:Othman Hamed、Patrick M. Henry、Daniel P. Becker
DOI:10.1016/j.tetlet.2010.04.105
日期:2010.7
This manuscript describes the extension of Stille’s palladium-catalyzed olefin dicarbonylation reaction to chiralallylicalcohols with chiralitytransfer to afford the corresponding chiralalcohol functionalized with bis-carbomethoxy esters, containing three contiguous chiral centers, in good to excellent diastereoselectivities (78–98%).
REACTION OF ENOL ACETATE WITH ACETAL AND CARBONYL COMPOUND IN THE PRESENCE OF LEWIS ACID
作者:Teruaki Mukaiyama、Toshio Izawa、Kazuhiko Saigo
DOI:10.1246/cl.1974.323
日期:1974.4.5
It was found that, in the presence of Lewis acid such as TiCl4, AlCl3, SnCl4, ZnCl2, and BF3·O(C2H5)2, enolacetate reacts with various acetals and benzaldehyde to afford the corresponding aldol-type addition products in good yields.
<i>tert</i>-Butyl Nitrite: Organic Redox Cocatalyst for Aerobic Aldehyde-Selective Wacker–Tsuji Oxidation
作者:Xiao-Shan Ning、Mei-Mei Wang、Chuan-Zhi Yao、Xian-Min Chen、Yan-Biao Kang
DOI:10.1021/acs.orglett.6b01165
日期:2016.6.3
An aldehyde-selective aerobic Wacker–Tsuji oxidation is developed. Using tert-butylnitrite as a simple organic redox cocatalyst instead of copper or silver salts, a variety of aldehydes were achieved as major products in up to 30/1 regioselectivity as well as good to high yields at room temperature.