... Tetrahedron Letters. Volume 30, Issue 38, 1989, Pages 5121–5124. Cover image Cover image. A new synthesis of α-amino acids (E)-β,γ-enol ethers. ... Laboratoire de Bioorganique et Biotechnologies, UA CNRS 1389 Ecole Nationale Supérieure de Chimie de Paris 11, rue P. & ...