An improved procedure for the conversion of D-serine into tert-butyl (R)-4-
formyl-2,2-dimethyloxazolidine-3-caboxylate [the (R)-Garner aldehyde] is de
scribed which can be carried out in four operationally simple steps in 88%
overall yield. Elaboration of this aldehyde to vinyl glycinol is also descr
ibed.