A gas chromatographic—mass spectrometric study on TMS derivatives of sorbose, 2-keto-l-gulonic acid and ascorbic acid

A gas chromatog.-mass spectral study is made of trimethylsilylated derivs. of sorbose (I) and 2-L-xylo-hexulosonic acid (II); II can be prepd. by the Pt-catalyzed oxidn. of I by O. II (b-pyranose form) is probably obtained from I via b-sorbopyranose (III). Retention times and mass spectral data are given for III, II (a- or b-furanose), II (a-pyranose), II (b-pyranose), and ascorbic acid