30129-18-1Relevant articles and documents
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
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Paragraph 0021-0025; 0040-0042, (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
MELANOCORTIN RECEPTOR AGONISTS
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Page/Page column 27, (2008/06/13)
The present invention relates to a compound of the following formula 1, pharmaceutically acceptable salt and isomer thereof effective as agonist of melanocortin receptor, and an agonistic composition of melanocortin receptor comprising the same as active ingredient.