Iodine-catalyzed one-pot three-component synthesis of homoallyl benzyl ethers from aldehydes
摘要:
Iodine has been found to be an effective catalyst for one-pot synthesis of homoallyl benzyl ethers under mild reaction conditions. Various homoallyl benzyl ethers were synthesized in moderate to high yield by three-component condensation of aldehydes, benzyloxytrimethylsilane, and allyltrimethylsilane in presence of iodine (10 mol %) in dichloromethane at 0 degrees C. (C) 2009 Elsevier Ltd. All rights reserved.
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
Silicomolybdic acid that is supported on silicagel (50 wt %) efficiently catalyzes the high-yielding Hosomi–Sakurai allylation of carbonyl compounds by allyltrimethylsilane in the presence of benzyl alcohol. The reaction rates of inactive substrates and the yields were greatly increased when preformed acetals were used as substrates.
HClO4-supported on silica gel: a mild and efficient catalyst for Hosomi–Sakurai reaction
作者:Kaliyappan Murugan、Chinpiao Chen
DOI:10.1016/j.tetlet.2011.08.145
日期:2011.11
Perchloric acid supported on silicagel was found to be an efficient catalyst (2 mol %) for the Hosomi–Sakurai allylation of numerous aldehydes with allyltrimethylsilane in the presence of benzyl alcohol. This method was also effective for the allylation of secondary alcohols under mild experimental conditions.
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.