133261-33-3Relevant academic research and scientific papers
Electrocatalytic hydrogenation of benzoic acids in a proton-exchange membrane reactor
Atobe, Mahito,Fukazawa, Atsushi,Shida, Naoki,Shimizu, Yugo
supporting information, p. 7363 - 7368 (2021/09/08)
The highly efficient chemoselective electrocatalytic hydrogenation of benzoic acids (BAs) to cyclohexanecarboxylic acids (CCAs) was carried out in a proton-exchange membrane reactor under mild conditions without hydrogenation of the carboxyl group. Among the investigated catalysts, the PtRu alloy catalyst was found to be the most suitable for achieving high current efficiencies for production of CCAs. An electrochemical spillover mechanism on the PtRu alloy catalyst was also proposed.
Accessing Difluoromethylated and Trifluoromethylated cis-Cycloalkanes and Saturated Heterocycles: Preferential Hydrogen Addition to the Substitution Sites for Dearomatization
Zhang, Xue,Ling, Liang,Luo, Meiming,Zeng, Xiaoming
supporting information, p. 16785 - 16789 (2019/11/11)
Reported here is a straightforward process in which a cyclic (alkyl)(amino)carbene/Rh catalyst system facilitates the preferential addition of hydrogen to the substitution sites of difluoromethylated and trifluoromethylated arenes and heteroarenes, leading to dearomative reduction. This strategy enables the diastereoselective synthesis of cis-difluoromethylated and cis-trifluoromethylated cycloalkanes and saturated heterocycles, and even allows formation of all-cis multi-trifluoromethylated cyclic products with a defined equatorial orientation of the di- and trifluoromethyl groups. Deuterium-labeling studies indicate that hydrogen preferentially attacks the substitution sites of planar arenes, resulting in dearomatization, possibly with heterogeneous Rh as the reactive species, followed by either reversible or irreversible hydrogen addition to the nonsubstitution sites.
Method for synthesizing cis-trifluoromethylcyclohexane derivatives and heterocyclic compounds by hydrogenation
-
Paragraph 0021-0023; 0052-0054, (2019/10/23)
The invention discloses a method for synthesizing cis-trifluoromethylcyclohexane derivatives and heterocyclic compounds by hydrogenation. The method is characterized in that trifluoromethylaromatic hydrocarbons or trifluoromethyl heterocyclic compounds ar
Epimerization of 2- or 4- substituted cyclohexanecarboxylic acids
-
, (2008/06/13)
The present invention relates to a new method for obtaining a purity of about 93% to 100% of the trans form of 2- or 4-substituted cyclohexanecarboxylic acid or reactive derivatives thereof from the cis form or a mixture of the cis and trans forms by a single step, particularly, to a method for obtaining a purity of substantially 100% of the trans form of 4-substituted cyclohexanecarboxylic acid.
