•
For use as a chiral building-block in the synthesis of the (S)-isomer of -butyrolactone-4-carboxylic acid, see: Org. Synth. Coll., 7, 99 (1990):

• For the differential protection of the ɑ-carboxyl group of N-protected glutamic acid by reaction with formaldehyde to form the cyclic 5-oxazolidinone, see: Synthesis, 542 (1989).