Studien über den Mechanismus chemischer Reaktionen, XXII. (Über Hydrierungen und über spezifische Hydrierungen mittels gebundenen Wasserstoffs, VI). Hydrierungen mittels Terpenen

Limonene

“…The major product (167) (for which full spectral data were given) was used to prepare octalones. [It would appear that they were hoping to prepare the eudesmane skeleton; although it was formed, the major isomers that were produced were the cis-and the trans-isomer of ( 168).] 367 A reaction that has given rise to some discussion is that between limonene and maleic anhydride.…”

Reduction of citral in water under typical transfer hydrogenation conditions—Reaction mechanisms with evolution of and hydrogenation by molecular hydrogen

“…Such a decomposition reaction of HCOONa with noble metal catalysts was reported, but no hydrogen was detected to form in the presence of acceptor in the literature [34]. In addition, some researchers suggested that the acceptor could not or less be reduced with the produced hydrogen under the conditions, even though hydrogen was produced in their experiments [35,36]. For example, it was observed that formic acid decomposed to H 2 and CO 2 to a larger extent during Ru II -catalyzed asymmetric TH of ketones; however, the gaseous hydrogen was claimed to contribute very less to the formation of alcohols [35].…”

“…For example, it was observed that formic acid decomposed to H 2 and CO 2 to a larger extent during Ru II -catalyzed asymmetric TH of ketones; however, the gaseous hydrogen was claimed to contribute very less to the formation of alcohols [35]. In another example, hydrogen was reported to be released from p-menthane and decalin in xylene at 144 • C but no hydrogenation reaction occurred [36].…”

Application of Laser Induced Breakdown Spectroscopy as a Novel Approach for Monitoring of the Activity of Nano Palladium Catalyst as Compared to Two Well‐known Methods

“…In CTH reaction, hydrogen derived by an easily aromatized cyclic compound can transfer directly to an unsaturated substance with the use of catalyst . Hydrogen gas can be supplied by solvent as hydrogen donor compound using an appropriate catalyst for such reactions . With a comparison of the effectiveness of various catalysts, palladium catalysts are the most operative for hydrocinnamic production from cinnamic acid .…”