7741-81-3Relevant academic research and scientific papers
Recyclable cobalt(0) nanoparticle catalysts for hydrogenations
Büschelberger, Philipp,Reyes-Rodriguez, Efrain,Sch?ttle, Christian,Treptow, Jens,Feldmann, Claus,Jacobi Von Wangelin, Axel,Wolf, Robert
, p. 2648 - 2653 (2018/05/30)
The search for new hydrogenation catalysts that replace noble metals is largely driven by sustainability concerns and the distinct mechanistic features of 3d transition metals. Several combinations of cobalt precursors and specific ligands in the presence of reductants or under high-thermal conditions were reported to provide active hydrogenation catalysts. This study reports a new method of preparation of small, monodisperse Co(0) nanoparticles (3-4 nm) from the reduction of commercial CoCl2 in the absence of ligands or surfactants. High catalytic activity was observed in hydrogenations of alkenes, alkynes, imines, and heteroarenes (2-20 bar H2). The magnetic properties enabled catalyst separation and multiple recyclings.
Photochemistry of Aliphatic Imides. Synthesis of Azetidine-2,4-diones via Photochemical Isomerization of Succinimides and N-Formyl-N-methyl α, β -Unsaturated Amides
Maruyama, Kazuhiro,Ishitoku, Takeshi,Kubo, Yasuo
, p. 27 - 34 (2007/10/02)
Photochemical reactions of alkyl-substituted succinimides and N-formyl-N-methyl α, β -unsaturated amides were studied.Photolysis of succinimide 1 gave azetidine-2,4-dione 2 together with a small amount of 3.The photoinduced ring-contraction reaction is explained in terms of a two-photon mechanism.Similarly, several other succinimide derivates photochemically gave the corresponding azetidine-2,4-diones.In addition, the photochemical cyclization of 3 to 2 was extended to the synthesis of azetidine-2,4-diones from N-formyl-N-methyl α, β -unsaturated amides.
