158267-01-7Relevant academic research and scientific papers
Diastereoselective hetero-Diels-Alder cycloaddition of a C-nitroso compound prepared starting from a homochiral imidazolidin-2-one
Cardillo,Galeazzi,Mobbili,Orena,Rossetti
, p. 1535 - 1540 (1994)
By Swern oxidation of the hydroxamic acid 3, prepared from the homichiral imidazolidin-2-one 1, the transient C-nitroso derivative 4 is obtained, and its cycloaddition to either cyclohexadiene or cyclopentadiene proceeds with high diastereoselection, owin
Enantiopure derivatives of aza-baylis-hillman adducts by subsequent sn'-sn' reactions of acylcarbamates bearing a chiral auxiliary
Martelli, Gianluca,Marcucci, Eleonora,Orena, Mario,Rinaldi, Samuele
experimental part, p. 2824 - 2835 (2009/12/06)
Reactions of (4S,5R)-1-(3,4-Dimethyl-2-oxo-5-phenylimidazolidine) carbonylisocyanate (4) with appropriate Baylis-Hillman adducts 5 gave the corresponding acyl carbamates 6,7 as equimolar diastereomeric mixtures. These mixtures were treated with DABCO, to afford with moderate diastereoselection easily separable [2-(3",4"-dimethyl-2"-oxo-5"- phenylimidazolidine-1-carboxamido)(aryl)methyl]acrylates 8 and 9.
