A Mild Chemoselective Ru-Catalyzed Reduction of Alkynes, Ketones, and Nitro Compounds
作者:Tobias Schabel、Christian Belger、Bernd Plietker
DOI:10.1021/ol401185t
日期:2013.6.7
The chemoselective reduction of alkyne, ketones, or nitro groups using (Ph3P)3RuCl2 as an inexpensive catalyst and Zn/water as a stoichiometric reductant is reported. Depending on the nature of the additive and the temperature, good chemoselectivities were observed allowing, e.g., for the selective reduction of a nitro group in the presence of a ketone or an alkyne.
Aryl–aryl interactions as directing motifs in the stereodivergent iron-catalyzed hydrosilylation of internal alkynes
作者:Christian Belger、Bernd Plietker
DOI:10.1039/c2cc31395b
日期:——
The defined Fe hydride complex FeH(CO)(NO)(Ph3P)2 is highly active as a catalyst for selective hydrosilylation of internal alkynes to vinylsilanes. Depending on the silane employed either E- or Z-selective hydrosilylation products were formed in excellent yields and good to excellent stereoselectivities.
Room temperature <i>Z</i>-selective hydrogenation of alkynes by hemilabile and non-innocent (NNN)Co(<scp>ii</scp>) catalysts
作者:Dipesh M. Sharma、Chandrakant Gouda、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1039/d2cy00027j
日期:——
Hemilabile and phosphine-free quinolinyl-based NNN-type pincer and non-pincer cobalt complexes were developed for the room temperature catalytic transfer semi-hydrogenation of alkynes to Z-alkenes. Treatment of the quinolinyl-amine ligand, [C9H6N(NH)CH2CH2NEt2] (QNNNCH2NEt2)–H with CoX2 afforded the pincercomplexes κ3-(QNNNCH2NEt2)CoX2 (X = Cl, Br), whereas, the quinolinyl-amide ligand, [C9H6N(NH)C(O)CH2NEt2]
Electrochemical Proton Reduction over Nickel Foam for
<i>Z</i>
‐Stereoselective Semihydrogenation/deuteration of Functionalized Alkynes
作者:Alejandro Valiente、Pablo Martínez‐Pardo、Gurpreet Kaur、Magnus J. Johansson、Belén Martín‐Matute
DOI:10.1002/cssc.202102221
日期:2022.1.10
Foam catalyst: Commercially available nickel foam is an excellent catalyst for the electrochemical semihydrogenation/semideuteration of functionalized alkynes in diluted sulfuric acid under ambient conditions. Here, the applicability of this catalyst for the stereoselective synthesis of Z-alkenes and Z-alkenes-d2 is presented. The nickel foam is recyclable up to 14 times without losing its catalytic
The conjugation of photoactive benzophenone with diphenylalanine yielded a self-assembling photocatalyst that was probed in the E → Z photoisomerisation of stilbene derivatives.
光活性二苯甲酮与二苯基丙氨酸共轭产生了一种自组装光催化剂,并在二苯乙烯衍生物的 E → Z 光异构化过程中进行了探究。