Virtually complete control of simple and face diastereoselectivity in the Michael addition reactions between achiral equivalents of a nucleophilic glycine and (S)- or (R)-3-(E-enoyl)-4-phenyl-1,3-oxazolidin-2-ones: Practical method for preparation of β-substituted pyroglutamic acids and prolines

1. Soloshonok, V.A.
2. Ueki, H.
3. Tiwari, R.
4. Cai, C.
5. Hruby, V.J.