110-38-3Relevant articles and documents
Preparation of a carbon-based solid acid catalyst by sulfonating activated carbon in a chemical reduction process
Liu, Xiao-Yan,Huang, Miao,Ma, Hai-Long,Zhang, Zeng-Qiang,Gao, Jin-Ming,Zhu, Yu-Lei,Han, Xiao-Jin,Guo, Xiang-Yun
, p. 7188 - 7196 (2010)
Sulfonated (SO3H-bearing) activated carbon (AC-SO3H) was synthesized by an aryl diazonium salt reduction process. The obtained material had a SO3H density of 0.64 mmol·g-1 and a specific surface area of 602 m2·g-1. The catalytic properties of ACSO3H were compared with that of two commercial solid acid catalysts, Nafion NR50 and Amberlyst-15. In a 10-h esterification reaction of acetic acid with ethanol, the acid conversion with ACSO3H (78%) was lower than that of Amberlyst-15 (86%), which could be attributed to the fact that the SO3H density of the sulfonated carbon was lower than that of Amberlyst-15 (4.60 mmol·g-1). However, AC-SO3H exhibited comparable and even much higher catalytic activities than the commercial catalysts in the esterification of aliphatic acids with longer carbon chains such as hexanoic acid and decanoic acid, which may be due to the large specific surface area and mesoporous structures of the activated carbon. The disadvantage of AC-SO3H is the leaching of SO3H group during the reactions.
INFLUENCE OF SMALL ADDITIONS OF SnCl2 ON THE YIELD AND REGIOSELECTIVITY OF THE HYDROCARBOALKOXYLATION REACTION IN THE ACETONE - PdCl2 -PPh3 SYSTEM AT LOW CO PRESSURES
Terekhova, M. I.,Karpyuk, A. D.,Kolosova, N. D.,Petrov, E. S.,Beletskaya, I. P.
, p. 2176 (1983)
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Catalytic Asymmetric Hydroalkylation of α,β-Unsaturated Amides Enabled by Regio-Reversed and Enantiodifferentiating syn-Hydronickellation
Zhou, Fang,Zhu, Shaolin
, p. 8766 - 8773 (2021/07/26)
Here, we report an enantioselective nickel-hydride catalyzed hydroalkylation of readily accessible β-alkyl-α,β-unsaturated amides to form structurally diverse β-chiral amides. This process was proposed to proceed through an enantiodifferentiating syn-hydrometalation of nickel hydride, forming chiral alkylnickel at the β-position in which the regioselectivity is different from that with copper hydride. This regio-reversed hydronickellation process provides a complementary approach to access enantioenriched β-functionalization amides with a stereocenter at the β-position.
Oxidative Esterification of Aldehydes and Alcohols Catalyzed by Camphor-Based Imidazolium Salts
Bian, Tiancen,Feng, Li,Li, Danfeng,Huang, Jiaxin,Zhao, Yuxun,Xu, Xu,Yang, Yiqin,Wang, Shifa
, p. 1812 - 1820 (2020/01/11)
Abstract: Sixteen new camphor-based imidazolium salts have been synthesized with renewable camphorsulfonic acid as the starting material. The chemical shifts of the characteristic proton of C2 on the imidazolium ring (N?C=N) were discussed thoroughly and all of these imidazolium salts exhibit good thermal stability. Furthermore, the excellent catalytic performance of the synthesized imidazolium salts were observed in the oxidative esterification between aromatic or aliphatic aldehydes containing electron-withdrawing or electron-donating groups on aromatic ring and primary or secondary alcohol by air as the sole oxidant. Graphic Abstract: [Figure not available: see fulltext.].
Low-temperature organic phase change energy storage material, preparation method and applications thereof
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Paragraph 0039; 0062-0065, (2019/10/01)
The invention discloses a low-temperature organic phase change energy storage material, which comprises one or a variety of organic carboxylic acid esters, the carbon chains R1 and R2 are on both sides of the ester bond, R1 comprises a C10-C24 alkyl carbon chain, R2 comprises C1-C8 alkyl carbon chain, the phase change temperature is -25-60 DEG C, and the phase change latent heat is 100-250 kJ/kg.According to the present invention, the low-temperature organic phase change energy storage material has advantages of low phase change temperature, high phase change latent heat, good liposolubility,wide phase change temperature range and bio-based renewability, and has good application in a variety of fields.
