5891-21-4Relevant articles and documents
A novel composite electrode material derived from bisferrocenyl-functionalized GO and PANI for high performance supercapacitor
Ahadzadeh, Iraj,Mohammadi, Reza,Payami, Elmira,Teimuri-Mofrad, Reza
, (2020)
A novel bisferrocenyl based epoxy compound was synthesized to be used for further surface modification of graphene oxide (GO). GO surface was firstly modified with ethylenediamine (EDA) as an amine linker and then bisferrocenyl based epoxy compound was covalently grafted to the GO surface through the epoxide ring opening reaction. Afterwards, polyaniline (PANI) nanofibers were physically adsorbed onto the surface of the modified GO to obtain a potentially high-performance nanocomposite for battery-type supercapacitor applications. The surface modification, crystalline structure, morphology, composition, and microstructure of the synthesized nanocomposites were further investigated using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and N2 adsorption/desorption analyses, respectively. Also, the electrochemical behavior of the synthesized nanocomposites was investigated by electrochemical methods of cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), galvanostatic charge-discharge measurement (GCD). The final nanocomposite electrode exhibited a charge storage capacity of 272 mAh g?1, and capacity retention of 89 % over 3000 CV cycles. A high energy density of 69.3 Wh kg?1 and high power density of 6171 W kg?1 were achieved in a symmetrical two-electrode configuration.
Selective method for the preparation of 5-chloropentan-2-one
Vinogradov, M. G.,Gorshkova, L. S.,Ferapontov, V. A.,Zinenkov, A. V.
, p. 756 - 758 (1995)
A selective method for the preparation of 5-chloropentan-2-one by interaction of 1-methylcyclobutanol with Ca(OCl)2 followed by decomposition of the hypochlorite thus obtained in the presence of FeII salt is proposed.The selectivity of the ketone formation from the alcohol is 98percent, while the conversion of the alcohol is 35-40percent. - Key words: 5-chloropentan-2-one, 1-methylcyclobutanol, 1-methylcyclobutylhypochlorite, free radical decomposition.
Method for synthesizing cyclopropyl methyl ketone
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Paragraph 0029; 0031; 0033; 0035; 0037; 0039; 0041, (2020/03/17)
The synthesis method, uses :1) methylfuran as the raw material 2 - to obtain,chloro - 2 2-pentanone, and the method comprises the following steps ;2): carrying out hydrogen hydrolysis 1) through one-pot hydrogenation hydrolysis, in the presence of the hydrogenation catalyst 5 - hydrogen and water.3). The method 2) for synthesizing the cyclopropylmethyl ketone according to step 5 - comprises the following steps: preparing the cyclopropylmethyl ketone, through a one-pot hydrogenation hydrolysis reaction and a ring-closing reaction step. to prepare the cyclopropylmethyl ketone, by a one-pot, hydrogenation hydrolysis reaction. 2 - The method comprises the following steps: synthesizing,methyl furan as, a raw material, through a one- pot 2 - hydrogenation hydrolysis reaction and, a ring- closing reaction to, prepare the. cyclopropylmethyl ketone by a one- pot hydrogenation hydrolysis reaction and a ring-closing reaction to obtain the cyclopropylmethyl ketone.
Synthesis method and method for synthesizing plant alcohol, isoplant alcohol and geranyl geraniol by using intermediate farnesylacetone (by machine translation)
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Paragraph 0061; 0072; 0078-0079, (2020/07/21)
The invention relates to a synthesis method of intermediate farnesyl acetone and a method for synthesizing vitamin E, vitamin K1, vitamin K2 side chain isovegetable alcohol, plant alcohol and geranyl geraniol by using farnesyl acetone, and concretely relates to hydrogenation of 5 - farnesyl -2 - acetone and farnesyl acetone through three Grignard reaction to obtain plant ketone. The farnesyl acetone reacts with the vinyl chloride Grignard reagent to obtain geranyl linalool, the aromatic leaf-based geraniol is rearranged under acid catalysis, or farnesyl acetone is directly reacted with the hydroxyl-protected 2 - chloroethanol Grignard reagent to obtain geraniol. The plant alcohol is reacted with the vinyl chloride Grignard reagent to obtain the plant alcohol, and the plant alcohol is directly reacted with the hydroxyl-protected 2 - chloroethanol Grignard reagent to obtain the plant alcohol. The method has the advantages of cheap and easily available starting materials, short synthetic process steps, low product cost and the like. (by machine translation)
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 (2020/07/06)
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.
Preparation method of 2-chloro-1-(1-chlorocyclopropyl) acetone
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Paragraph 0029; 0030; 0031; 0034; 0035; 0036; 0039; 0040, (2019/05/28)
The invention relates to the technical field of chemical synthesis, and particularly discloses a preparation method of 2-chloro-1-(1-chlorocyclopropyl) acetone. The preparation method comprises the following steps: enabling alpha-acetyl-gamma butyrolactone and hydrochloric acid to have an open-loop decarboxylic reaction to obtain 5-chloro-2-pentanone; adding the 5-chloro-2-pentanone and a catalystinto an alkaline solution, implementing a cyclization reaction, obtaining cyclopropyl methyl ketone; implementing a chlorination reaction with a chloride agent to obtain the 2-chloro-1-(1-chlorocyclopropyl) acetone. The reaction steps of the provided method are less, the reaction period is short, the yield is more than 70%, and the content of the 2-chloro-1-(1-chlorocyclopropyl) acetone in a product is more than 95%.
Efficient Palladium(0) supported on reduced graphene oxide for selective oxidation of olefins using graphene oxide as a ‘solid weak acid’
Gao, Xi,Zhou, Jianhao,Peng, Xinhua
, p. 73 - 78 (2019/02/06)
Selective oxidation of olefin derivatives to ketones has made innovative development over palladium(0) supported on reduced graphene oxide. Compared to traditional Wacker oxidation, the novel method offers an economical and environment-friendly option by using graphene oxide (GO) as a ‘solid weak acid’ instead of classical homogeneous catalysts like H2SO4 and CF3COOH. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope and transmission electron microscopy images of Pd0/RGO showed that the nanoscaled Pd particles generated at the flake structure of reduced graphene oxide. Under optimized condition, up to 44 kinds of ketones with different structures can be prepared with excellent yields.
A pharmaceutical intermediate 5 - chloro - 2 - pentanone synthetic method (by machine translation)
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Paragraph 0007, (2018/04/03)
The present invention discloses a pharmaceutical intermediate 5 - chloro - 2 - pentanone synthetic method, in order to 3 - acetyl-propanol and HCl as raw materials, the chemical reaction under the following conditions: the temperature T=100 °C, vacuum degree P=- 0.045 mpa, 3 - acetyl-propanol and the molar ratio of HCl N=1:2, HCl concentration is 21%. The invention optimizes the 5 - chloro - 2 - pentanone synthesis temperature, vacuum degree, the molar ratio of the raw materials and the concentration of raw materials conditions, in industrial conditions, 5 - chloro - 2 - pentanone molar yield of 92%, and stability is good. (by machine translation)
Ferric(III) Chloride Catalyzed Halogenation Reaction of Alcohols and Carboxylic Acids Using α,α-Dichlorodiphenylmethane
Lee, Chang-Hee,Lee, Soo-Min,Min, Byul-Hana,Kim, Dong-Su,Jun, Chul-Ho
supporting information, p. 2468 - 2471 (2018/04/25)
A new method for chlorination of alcohols and carboxylic acids, using α,α-dichlorodiphenylmethane as the chlorinating agent and FeCl3 as the catalyst, was developed. The method enables conversions of various alcohols and carboxylic acids to their corresponding alkyl and acyl chlorides in high yields under mild conditions. Particulary interesting is the observation that the respective alkyl bromides and iodides can be generated from alcohols when either LiBr or LiI are present in the reaction mixtures.
Pharmaceutical intermediate 5-chloro-2-pentanone synthesis method
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Paragraph 0023; 0032; 0041; 0046; 0050; 0054; 0059, (2018/10/11)
The invention discloses a pharmaceutical intermediate 5-chloro-2-pentanone synthesis method, which comprises: placing 2-methylfuran in a reaction kettle, introducing nitrogen gas, adding a Cu-Mn-Mo composite oxide, controlling the temperature at 20-30 DEG C, introducing hydrogen, controlling the pressure at 0.25-0.3 MPa, carrying out a reaction for 30-45 min, stopping the reaction, filtering the prepared mixture, collecting the filtrate, and preparing 2-methyl-4,5-dihydrofuran; and mixing the prepared 2-methyl-4,5-dihydrofuran and diethyl ether, adding the mixture to a reaction kettle, controlling the temperature at 70-80 DEG C, adding FeCl3, uniformly stirring, controlling the pressure at 0.05-0.08 Mpa, carrying out microwave treatment for 30-45 min, carrying out a stirring reflux reaction for 2-3 h, adding water after completing the reaction, uniformly mixing, carrying out a stirring reaction for 1-2 h, restoring to a room pressure and a room temperature, collecting the organic layer, and carrying out pressure reducing distillation to prepare 5-chloro-2-pentanone. According to the present invention, the synthesis method has characteristics of simple operation, mild condition, less by-product, high product purity and high product yield.
