64944-51-0Relevant academic research and scientific papers
Gold-catalysed synthesis of exocyclic vinylogous amides and β-amino ketones: A detailed study on the 5-exo/6-endo-dig selectivity, methodology and scope
Scarpi, Dina,Begliomini, Stefano,Prandi, Cristina,Oppedisano, Alberto,Deagostino, Annamaria,G?mez-Bengoa, Enrique,Fiser, Béla,Occhiato, Ernesto G.
, p. 3251 - 3265 (2015/05/20)
The gold(I)-catalysed reaction of N-Boc-protected 6-alkynyl-3,4-dihydro-2H-pyridines, which gives synthetically useful vinylogous amides (β-enaminones), has been studied in detail, in order to optimize the reaction conditions, enlarge the scope and gain i
A new bicyclic oxazaborines with a bridged nitrogen atom, their thermic rearrangement and fluorescence properties
Josefík, Franti?ek,Svobodová, Markéta,Bertolasi, Valerio,?im?nek, Petr,MacHá?ek, Vladimír,Almonasy, Numan,?erno?ková, Eva
, p. 75 - 81 (2012/02/16)
Cyclic β-enaminones bearing secondary amino group react with 4-substituted benzenediazonium tetraphenylborates in dichloromethane to form substituted bicyclic [1,3,2λ4]oxazaborines The oxazaborines rearrange, on heating to 200 °C in the absence of solvent or in DMF or DMSO, to isomeric 2H-[1,2,4,3λ4]triazaborines. Previously prepared [1,3,2λ4]oxazaborines derived from acyclic β-enaminones bearing secondary amino group either did not undergo the rearrangement or with a lot of difficulties and with negligible yield. The fluorescence behaviour of the prepared triazaborines was observed. These compounds fluoresce in 2-methyltetrahydrofurane and in solid state under low temperatures.
Boric acid: a new regiospecific decarboxylating agent. Syntheses of cyclic imines, β-enaminones, and β-enaminodiketones from β-enaminoesters
Delbecq, Philippe,Bacos, Daniel,Celerier, Jean Pierre,Lhommet, Gerard
, p. 1201 - 1206 (2007/10/02)
The synthesis of cyclic imines 2, β-enaminones 6, and β-enaminodiketones 7 is described.Regio- and stereospecific thermolysis of β-enaminoesters 4 with boric acid permit these preparations in generally good yields. Key words: boric acid, cyclic β-enaminoesters, decarboxylation, cyclic imines, cyclic β-enaminones.
