Asymmetric Oxidative Dimerization of the Enolates of <i>N</i>-[Bis(methylthio)methylene]- and <i>N</i>-(Diphenylmethylene)glycine Esters
作者:Carlos Alvarez-Ibarra、Aurelio G. Csákÿ、Belén Colmenero、M. Luz Quiroga
DOI:10.1021/jo962116c
日期:1997.4.1
The oxidative dimerization of glycinates 1 with iodine takes place under kinetic control. The stereochemistry of the resulting 3-aminoaspartate 3 depends on the method used (base/solvent) to generate the corresponding enolate 2. Under suitable conditions, high yields and diastereomeric excesses in favor of the threo derivatives 3-I, which have C(2) symmetry, were obtained. In the presence of 8-phenylmenthol