1240520-79-9Relevant academic research and scientific papers
Thermal [2 + 2]-Cycloaddition of Ketenes with Chiral Enol Ethers: Route to Densely Substituted Cyclobutanones
Rullière, Pauline,Grisel, Julien,Poittevin, Clément,Cividino, Pascale,Carret, Sébastien,Poisson, Jean-Fran?ois
supporting information, p. 2824 - 2827 (2016/07/06)
Access to chiral polysubstituted cyclobutanones by [2 + 2]-cycloaddition of ketenes with chiral acyclic enol ethers is reported. A wide variety of easily accessible di- and monosubstituted ketenes were found to react with a very high degree of stereoselec
Asymmetric access to α-substituted functional aspartic acid derivatives by a [3+2] strategy employing a chiral dienophile
Ben Ayed, Kawther,Beauchard, Anne,Poisson, Jean-Francois,Py, Sandrine,Laurent, Mathieu Y.,Martel, Arnaud,Ammar, Houcine,Abid, Souhir,Dujardin, Gilles
, p. 2924 - 2932 (2014/05/20)
Enantiopure vinyl ethers of Stericol underwent diastereoselective thermal 1,3 dipolar cycloadditions with N-benzyl, N-benzhydryl, and N-PMB aspartate ester nitrones. Chemoselective N-debenzylation of the resulting cycloadducts afforded diastereomerically and enantiomerically pure crystalline NH-isoxazolidine, the absolute configuration of which was established by X-ray crystallography. N-Protection and N-O cleavage of this isoxazolidine gave enantioenriched quaternary aspartate derivatives bearing functionalized side chains.
