Diene hydroaminomethylation via ruthenium-catalyzed C–C bond forming transfer hydrogenation: beyond carbonylation
作者:Susumu Oda、Jana Franke、Michael J. Krische
DOI:10.1039/c5sc03854e
日期:——
Under the conditions of ruthenium catalyzed transferhydrogenation using 2-propanol as terminal reductant, 1,3-dienes engage in reductive C–C coupling with formaldimines obtained in situ from 1,3,5-tris(aryl)-hexahydro-1,3,5-triazines to form homoallylic amines. Deuterium labelling studies corroborate a mechanism involving reversible diene hydroruthenation to form an allylruthenium complex that engages
Direct Ruthenium-Catalyzed C−C Coupling of Ethanol: Diene Hydro-hydroxyethylation To Form All-Carbon Quaternary Centers
作者:Hoon Han、Michael J. Krische
DOI:10.1021/ol101077v
日期:2010.6.18
Under ruthenium-catalyzed transfer hydrogenation conditions, direct C−C coupling of ethanol and 2-substituted dienes occurs to furnish products of hydro-hydroxyethylation: anti-configured neopentyl homoallylic alcohols. Identical adducts are generated from acetaldehyde under related conditions employing isopropanol as reductant.
All-Carbon Quaternary Centers via Ruthenium-Catalyzed Hydroxymethylation of 2-Substituted Butadienes Mediated by Formaldehyde: Beyond Hydroformylation
作者:Tomas Smejkal、Hoon Han、Bernhard Breit、Michael J. Krische
DOI:10.1021/ja904124b
日期:2009.8.5
Ruthenium-catalyzedtransferhydrogenation of 2-substituted dienes 1a-i in the presence of paraformaldehyde results in reductivecoupling at the 2-position to furnish the hydroxymethylation products 3a-i, which embody all-carbon quaternary centers. Reductivecoupling of diene 1g to paraformaldehyde under standard conditions, but employing deuterio-paraformaldehyde, 2-propanol-d(8), or both, corroborated