565230-24-2Relevant academic research and scientific papers
Regioselective enamine formation from oxonia-boranuida-betaines and their application in asymmetric Michael reactions
Christoffers, Jens,Kreidler, Burkard,Unger, Sven,Frey, Wolfgang
, p. 2845 - 2853 (2007/10/03)
β-Diketonato borate betaines 2 are readily accessible by the reaction of β-dicarbonyl compounds 1 with BF3·OEt2. Reaction of borates 2 with L-valine diethylamide (3a) gives almost exclusively the exocyclic enamines 4 as the kinetic p
