ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Identification of methyl O-acetyl-O-trifluoroacetyl-β-D-xylopyranosides by gas chromatography and mass spectrometry

V. Mihálov, E. Petráková, and V. Kováčik

Institute of Chemistry, Centre for Chemical Research, Slovak Academy of Sciences, CS-84238 Bratislava

Abstract: Of all theoretically possible positional isomers of methyl O-acetyl-β-D-xylopyranosides, trifluoroacetyl derivatives have been prepared and studied by combination of electron impact mass spectrometry and gas chromato­graphy. All positional isomers are separated on an OV-225 column. The positions of acetyl groups in mono-O-acetyl derivatives may be established unambiguously from the intensities of peaks with m/z 182, 225, and 278. The mass spectra of di-0-acetyl derivatives differ from each other only negli­gibly. Therefore, in characterization of these derivatives the retention times relative to fully acetylated methyl  β-D-xylopyranoside (RRT) have to be considered.

Full paper in Portable Document Format: 435a685.pdf

Chemical Papers 43 (5) 685–691 (1989)