نتایج جستجو برای: alcohols electrooxidation

تعداد نتایج: 12381  

Journal: :Molecules 2017
Zi-Long Tang Lian Wang Jing-Zhao Tan Yi-Chao Wan Yin-Chun Jiao

A series of new 1-(carbamoylmethyl)-2-aryl-3,1-benzoxazines were prepared in moderate to good yields by BF₃·OEt₂-catalyzed reactions of aromatic aldehydes with 2-(N-substituted carbamoylmethylamino)benzyl alcohols. The structures of the target compounds were confirmed by IR, ¹H-NMR, 13C-NMR, and elemental analyses. The fungicidal activities of the target compounds against plant fungi were preli...

Journal: :Molecules 2016
Njomza Ajvazi Stojan Stavber

The efficiency of direct conversion of tertiary alcohols bearing a β-hydrogen atom to vicinal halohydrins-chlorohydrins and bromohydrins-under green reaction conditions was tested preliminarily on model tertiary benzyl alcohols. Tertiary alcohols were successfully directly halogenated to vicinal halohydrins with N-halosuccinimide in aqueous media. The efficiency of the reaction in water was sig...

Journal: :Journal of Physical Chemistry C 2021

A detailed understanding of the methanol electrooxidation reaction mechanism is important for further development fuel cells. By modeling on Au(111) using density funct...

Herein, a stepwise electrodeposition technique was used to synthesize the Pd based nanoparticles on indium-tin oxide (ITO) electrodes. First of all, Pd nanoparticles were electrodeposited on ITO via one step electrodeposition technique. Furthermore, Au was electrodeposited on Pd. Finally, Co was electrodeposited on Au and Pd electrodeposited ITO electrode via stepwise electrodeposition techniqu...

2012
P. Chen W. Wang J. Shaw

The studying of enzymatic esterification of carboxylic acids and higher alcohols was performed by esterase Saccharomyces cerevisiae in water-organic medium. Investigation of the enzyme specificity to acetic substrates showed the best result with acetic acid in esterification reactions with ethanol whereas within other carboxylic acids the esterification decreased with acids: hexanoic > pentanoi...

2014
M. S. Zaroog H. A. Kadir S. Tayyab

The effect of eight different alcohols including halogenols and alkanols on the structural transformation of aciddenatured ficin (ADF) at pH 2.5 was studied using farand near-UV circular dichroism (CD) and tryptophan fluorescence. Except methanol and ethanol, other alcohols induced α-helical structure in ADF, as revealed by the increase in MRE222nm values. The fluoro alcohols tested showed a hi...

Journal: :Molecules 2004
Katsuyuki Nakashima Sanae Okamoto Masakazu Sono Motoo Tori

Allylic alcohols were isomerized into ketones by the action of the Grubbs reagent. Some model alcohols were prepared and tested under similar conditions to reveal that less substituted alkenes rearrange more easily. More hindered alcohols are stable under these conditions, however, the simple allylic alcohols tend to isomerize producing ethyl ketone and the corresponding degraded methyl ketone.

2011
Yuriy V. Solodun Yulia B. Monakhova Thomas Kuballa Andriy V. Samokhvalov Jürgen Rehm Dirk W. Lachenmeier

In 2005, 30% of all alcohol consumption in Russia was unrecorded. This paper describes the chemical composition of unrecorded and low cost alcohol, including a toxicological evaluation. Alcohol products (n=22) from both recorded and unrecorded sources were obtained from three Russian cities (Saratov, Lipetsk and Irkutsk) and were chemically analyzed. Unrecorded alcohols included homemade samogo...

Journal: :Organic & biomolecular chemistry 2009
Xiaobing Zhang Zhan Lu Chunling Fu Shengming Ma

A highly regio- and stereoselective CuCl-mediated carbometallation reaction of 3-aryl-substituted secondary propargylic alcohols with alkyl, aryl, vinyl or allyl Grignard reagents for the synthesis of fully-substituted allylic alcohols was developed. The R(2) group from the Grignard reagent was successfully introduced to the 2-position of the propargylic alcohols due to the chelation of metal a...

Journal: :Chemistry 2014
Xiao Shen Qinghe Liu Tao Luo Jinbo Hu

Unlike the facile synthesis of β-monofluoromethyl alcohols by nucleophilic monofluoromethylation of epoxides, the synthesis of β-difluoromethyl alcohols by nucleophilic difluoromethylation of epoxides still remains a challenge. Herein, studies on tackling this problem with PhSO(NTBS)CF2H (2; TBS=tert-butyldimethylsilyl) are reported. The preorganization of 2 and epoxides with BF3⋅Et2O was found...

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