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- W2003587191 abstract "The gas chromatographic (GC) separation of diastereomeric pairs of ester de-rivatives of C9 − 12, C14 − 16 and C19 isoprenoid acids and alcohols has been investigated using commercially available fused-silica columns coated with methylsilicone and 5% phenylmethylsilicone stationary phases. On both phases, (−)-menthyl esters of R, S and RR, SS of all but the C12 isoprenoid acid were adequately resolved within 100 min in one chromatographic analysis. The conditions used reduce previously reported analyses times and eliminate the need for specially prepared polarphase capillary columns. When examined under the same conditions, diastereomeric pairs of (+)-trans-chrysanthemates of only the C9, C10, C14 and C15 alcohols were resolved adquately. From these results we recommend the use of fused-silica columns coated with methylsilcone or 5% phenylmethylsilicone and, where possible, (−)-menthyl ester derivatives for routine stereochemical examination of acyclic isoprenoids by GC or GC—mass spectrometry. As a simple illustration of the application of these analytical conditions we report an investigation into the isomerisation of chiral centres in a series of all-R acyclic isoprenoid acids by heating with a montmorillonite clay The use of this GC method facilitated the examination f the reaction products by mass fragmentography and showed that significant isomerisation had occurred only in chiral centres adjacent to the carboxyl group." @default.
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- W2003587191 date "1984-01-01" @default.
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- W2003587191 title "Gas chromatography and gas chromatography—mass spectrometry analysis of diastereomeric acyclic isoprenoid esters using fused-silica capillary columns." @default.
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- W2003587191 doi "https://doi.org/10.1016/s0021-9673(01)92791-8" @default.
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