For details of use in enantioselective aldol condensation, see: Org. Synth. Coll., 8, 339 (1993).
A simplified method of acylation of the oxazolidinone, avoiding the need for rigorously anhydrous conditions, has been reported using acyl chlorides, anhydrides or pivaloyl mixed anhydrides as the acylating agents catalyzed by DMAP: Synthesis, 1283 (1996).