(S)-(?)-Tetrahydrofuran-2-carboxamide can be used as a precursor for the preparation of (S)-tetrahydrofuran-2-carbonitrile (THFCN) via dehydration reaction using thionyl chloride and DMF. THFCN can be further methylated with methylmagnesium chloride (Grignard reagent) to produce (S)-1-(tetrahydrofuran-2-yl)ethenone.
