(S)-2-Phenylglycinol, ethyl glyoxylate, formaldehyde and benzotriazole formed stereospecifically ethyl (2S,4S)-N-(benzotriazol-1-yl)methyl-4-phenyloxazolidine-2-carboxylate (1) which was converted into chiral N-substituted oxazolidines, via regiospecific substitutions of the benzotriazolyl residue.
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