103-78-6Relevant academic research and scientific papers
Ruthenium-catalyzed hydrative dimerization of allenes
Saito, Shinichi,Dobashi, Naotomo,Wakatsuki, Yasuo
, p. 504 - 505 (2005)
Hydrative dimerization and hydration of allenes proceeded in the presence of a ruthenium catalyst and a strong acid such as trifluoroacetic acid. γ,δ-Unsaturated ketones and methyl ketones were isolated in moderate combined yields. No isomeric compound (isomeric enone) was isolated. Copyright
Vinylic Organoboranes. 7. Stereoselective Synthesis of (E)-(1-Substituted-1-alkenyl)boronic Esters by the Nucleophilic Substitution of (Z)-(1-Bromo-1-alkenyl)boronic Esters with Organolithium or Grignard Reagents. Isolation and Oxidation to Ketones.
Brown, Herbert C.,Imai, Toshiro,Bhat, N. G.
, p. 5277 - 5282 (1986)
The title compounds, (E)-R1CH=CR2B(OR)2 (4a-g), are prepared in a highly regio- and stereoselective manner by the reaction of (Z)-R1CH=CBrB(OR)2 (3a-g) with R2Li or R2MgX.The stereochemistry was established in two cases by isolating the E isomers 4 (R1, R2 = n-Bu; R1 = i-Pr, R2 = Me) in pure form and comparing the products with the corresponding Z isomers prepared by hydroboration of appropriate internal alkynes.Oxidation of 4 provides the corresponding ketones, R1CH2COR2, in high yields, confirming the carbon structures of the intermediate.As established previously, protonolysis of these (E)-boronic esters provides a synthesis of the pure (E)-alkenes.
Mixed La-Li heterobimetallic complexes for tertiary nitroaldol resolution
Tosaki, Shin-Ya,Hara, Keiichi,Gnanadesikan, Vijay,Morimoto, Hiroyuki,Harada, Shinji,Sugita, Mari,Yamagiwa, Noriyuki,Matsunaga, Shigeki,Shibasaki, Masakatsu
, p. 11776 - 11777 (2006)
A kinetic resolution of tertiary nitroaldols derived from simple ketones is described. Mixed BINOL/biphenol La-Li heterobimetallic complexes gave the best selectivity in retro-nitroaldol reactions of racemic tertiary nitroaldols. By using a mixture of La-Li3-(1a)3 complex (LLB 2a) and La-Li3-(1b)3 (LLB* 2b) complex in a ratio of 2/1, chiral tertiary nitroaldols were obtained in 80-97% ee and 30-47% recovery yield. Copyright
Iridium nanoparticles prepared in ionic liquids: An efficient catalytic system for the hydrogenation of ketones
Fonseca, Gledison S.,Scholten, Jackson D.,Dupont, Jairton
, p. 1525 - 1528 (2004)
Ir(0) nanoparticles with 2.3 ± 0.4 nm in diameter prepared by simple reduction of [Ir(cod)Cl]2 in 1-n-butyl-3-methylimidazolium hexafluorophosphate ionic liquid constitute a simple, efficient and recyclable catalytic system for the solventless or biphasic hydrogenation of ketones under mild reaction conditions.
Palladium/Copper-catalyzed Oxidation of Aliphatic Terminal Alkenes to Aldehydes Assisted by p-Benzoquinone
Komori, Saki,Yamaguchi, Yoshiko,Murakami, Yuka,Kataoka, Yasutaka,Ura, Yasuyuki
, p. 3946 - 3955 (2020)
The development of an anti-Markovnikov Wacker-type oxidation for simple aliphatic alkenes is a significant challenge. Herein, a variety of aldehydes can be selectively obtained from various unbiased aliphatic terminal alkenes using PdCl2(MeCN)2/CuCl in the presence of p-benzoquinone (BQ) under mild reaction conditions. Isomerization of the terminal alkene to the internal alkene was suppressed via slow addition of the starting material to the reaction mixture. In addition to the Pd catalyst, CuCl and BQ were essential in order to obtain the anti-Markovnikov product with high selectivity. Terminal alkenes bearing a halogen substituent afforded their corresponding aldehydes with high anti-Markovnikov selectivity. The halogen acts as a directing group in the reaction. DFT calculations indicate that a μ-chloro Pd(II)?Cu(I) bimetallic species with BQ coordinated to Cu is the catalytically active species in the case of a terminal alkene without a directing group.
A route for lignin and bio-oil conversion: Dehydroxylation of phenols into arenes by catalytic tandem reactions
Wang, Xingyu,Rinaldi, Roberto
, p. 11499 - 11503 (2013)
Finding a workaround: The conversion of lignin into low-boiling-point arenes instead of high-boiling-point phenols could greatly facilitate conventional refinery processes. A new procedure for the depolymerization of lignin and simultaneous conversion phenols into arenes is described. The method can also be rendered as a fundamental finding for the upgrade of bio-oils to arenes under mild conditions. Copyright
Highly efficient methyl ketone synthesis by water-assisted C-C coupling between olefins and photoactivated acetone
Shiraishi, Yasuhiro,Tsukamoto, Daijiro,Hirai, Takayuki
, p. 3117 - 3120 (2008)
(Chemical Equation Presented) Photoirradiation of an acetone/water mixture containing olefins affords the corresponding methyl ketones highly efficiently via a water-assisted CsC coupling between acetonyl radical and olefins.
Mixed La-Li heterobimetallic complexes for tertiary nitroaldol resolution
Hara, Keiichi,Tosaki, Shin-ya,Gnanadesikan, Vijay,Morimoto, Hiroyuki,Harada, Shinji,Sugita, Mari,Yamagiwa, Noriyuki,Matsunaga, Shigeki,Shibasaki, Masakatsu
, p. 5030 - 5036 (2009)
Full details of the kinetic resolution of tertiary nitroaldols derived from simple ketones are described. Mixed BINOL/biphenol La-Li heterobimetallic complexes gave the best selectivity in retro-nitroaldol reactions of racemic tertiary nitroaldols. Using
Metal complex, electroluminescent device containing metal complex and application of metal complex
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, (2021/07/17)
The invention provides a metal complex, an electroluminescent device containing the metal complex and application of the electroluminescent device, the metal complex has an M(La)m(Lb)n structure, the metal complex provided by the invention can more effectively finely adjust the luminescence color and adjust the luminescence peak width, so that the half-peak width is narrowed, the luminescence color is more saturated, the device efficiency is improved, and the current efficiency and the external quantum efficiency are relatively high.
Preparation method of cyclohexyl acetone
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Paragraph 0009; 0041-0062, (2021/05/29)
The invention provides a preparation method of cyclohexyl acetone, and particularly relates to the preparation method of cyclohexyl acetone by reacting a first catalyst, a second catalyst, cyclohexene and acetone with a mixed gas containing nitrogen and oxygen in acetic acid. The method disclosed by the invention is simple to operate, mild in reaction condition, less in generated solid waste, simple in post-treatment, recyclable in solvent and suitable for industrial production, and a reaction reagent with relatively high toxicity is avoided.
