22634-92-0Relevant articles and documents
[2]Catenane Synthesis via Covalent Templating
Pilon, Simone,Ingemann J?rgensen, Steen,van Maarseveen, Jan H.
, p. 2310 - 2314 (2021)
After earlier unsuccessful attempts, this work reports the application of covalent templating for the synthesis of mechanically interlocked molecules (MiMs) bearing no supramolecular recognition sites. Two linear strands were covalently connected in a perpendicular fashion by a central ketal linkage. After subsequent attachment of the first strand to a template via temporary benzylic linkages, the second was linked to the template in a backfolding macrocyclization. The resulting pseudo[1]rotaxane structure was successfully converted to a [2]catenane via a second macrocyclization and cleavage of the ketal and temporary linkages.
Applications of Homogeneous Water-gas Shift Reaction. IV. Hydrocarbonylation and Dimerization of Methyl Acrylate with CO and H2O
Murata, Kazuhisa,Matsuda, Akio
, p. 2195 - 2199 (2007/10/02)
Hydrocarbonylation of methyl acrylate with CO and H2O forms dimethyl 4-oxopimelate in 94percent yield based on H2O, the Co2(CO)8-1,2-bis(diphenylphosphino)ethane (diphos) catalyst system being used as in the case of ethylene or propylene.Increasing temperature tends to promote the dimerization and/or hydrodimerization of methyl acrylate to give 1,3-bis(methoxycarbonyl)-1-butene and/or dimethyl-2-methylglutarate.Effects of CO pressure and H2O concentration on the hydrocarbonylation and dimerization were examined at 135 and 165 deg C.Catalytically active intermediates for the hydrocarbonylation take part in the dimerization of methyl acrylate.