Optically active butenolide and g-butyrolactone derivatives were prepared by removing (R)-phenyl glycinol and (1R, 2R)-norpseudoephedrine used as chiral auxiliaries from butenolides and g-butyrolactones in two steps. The structures of these products were determined using 1H NMR, 13C NMR, Mass spect., IR and microanalysis.

Optically active butenolide and g-butyrolactone derivatives were prepared by removing (R)-phenyl glycinol and (1R, 2R)-norpseudoephedrine used as chiral auxiliaries from butenolides and g-butyrolactones in two steps. The structures of these products were determined using 1H NMR, 13C NMR, Mass spect., IR and microanalysis.