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
Synthesis of methyl ketones from terminal olefins using PdCl2/CrO3 system mimicking the Wacker process
作者:Rodney A. Fernandes、Venkati Bethi
DOI:10.1016/j.tet.2014.05.022
日期:2014.8
An efficient synthesis of methyl ketones from terminalolefinsusing PdCl2/CrO3 system mimicking the Wacker process is developed. The method shows good functional groups compatibility, no aldehyde by-products and is operationally simple. CrO3 is the sole oxidant and replaces both Cu-salts and molecularoxygen, traditionally used in this process. The method holds potential for future applications in
A Lewis Base Catalysis Approach for the Photoredox Activation of Boronic Acids and Esters
作者:Fabio Lima、Upendra K. Sharma、Lars Grunenberg、Debasmita Saha、Sandra Johannsen、Joerg Sedelmeier、Erik V. Van der Eycken、Steven V. Ley
DOI:10.1002/anie.201709690
日期:2017.11.20
either boronic acids or esters. This system enabled a wide range of alkyl boronic esters and aryl or alkyl boronic acids to react with electron-deficient olefins via radical addition to efficiently form C-C coupled products in a redox-neutral fashion. The Lewis base catalyst was shown to form a redox-active complex with either the boronic esters or the trimeric form of the boronic acids (boroxines) in
Organic photocatalysis for the radical couplings of boronic acid derivatives in batch and flow
作者:Fabio Lima、Lars Grunenberg、Husaini B. A. Rahman、Ricardo Labes、Joerg Sedelmeier、Steven V. Ley
DOI:10.1039/c8cc02169d
日期:——
We report an acridium-based organic photocatalyst as an efficient replacement for iridium-based photocatalysts to oxidise boronic acid derivatives by a single electron process. Furthermore, we applied the developed catalytic system to the synthesis of four active pharmaceutical ingredients (APIs). A straightforward scale up approach using continuous flow photoreactors is also reported affording gram