Bp. Hart et Jk. Coward, THE SYNTHESIS OF DL-3,3-DIFLUOROGLUTAMIC ACID FROM A 3-OXOPROLINOL DERIVATIVE, Tetrahedron letters, 34(31), 1993, pp. 4917-4920
DL-3,3-Difluoroglutamic acid was synthesized from a masked 3-hydroxypr
olinol, 6-hydroxy-l-aza-3-oxabicyclo3.3.0!octan-2-one, in eight steps
. The described synthetic route expands the utility of fluoroproline d
erivatives as precursors of fluoroglutamic acids.