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- W4242981211 abstract "2-Acetyl-1-pyrroline (1), 2-propionyl-1-pyrroline (2) and 5-acetyl-2,3-dihydro-1,4-thiazine (3), roast smelling odorants in food, form stable inclusion compounds with β-cyclodextrin. Fast atom bombardment (FAB) mass spectra of such complexes in thioglycerol showed abundant [G+Hs+Mx+H]+ ions, where G=guest (1, 2 or 3), Hs=host (β-cyclodextrin) and Mx=one molecule of matrix, consistent with protonated non-covalent three-component adducts, and nearly negligible 1:1 associations of the type [G+Hs+H]+. Collision-activated decomposition (CAD) experiments indicated that [G+Hs+Mx+H]+ are made of neutral β-cyclodextrin and protonated 1:1 guest–matrix adducts. The nature of these latter adducts was investigated by FAB mass spectrometric experiments on 1, 2 and 3 in thioglycerol without β-cyclodextrin. In all cases the most intense signals are due to [G+Mx+H]+ and [G+H]+, with a small contribution of [G+Mx-H2O+H]+ to the total ion current. CAD experiments on [G+Mx+H]+ afforded protonated guest molecules as the base peak, consistent with the decomposition of protonated non-covalent 1:1 guest–matrix associations, possibly mediated by an intermolecular hydrogen bond. According to these data, there is a significant contribution of non-covalent three-component associations to [G+Hs+Mx+H]+ complexes, although the possibility of the formation of covalent guest–matrix adducts is not ruled out definitely, as discussed in the text. © 1997 by John Wiley & Sons, Ltd." @default.
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- W4242981211 date "1997-08-01" @default.
- W4242981211 modified "2023-09-26" @default.
- W4242981211 title "Fast Atom Bombardment Mass Spectrometric and Tandem Mass Spectrometric Investigation in Thioglycerol on Protonated Noncovalent Associations of -Cyclodextrin with 2-Acetyl, 2-Propionyl-1-pyrroline and 5-Acetyl-2,3-dihydro-1,4-thiazine, Roast Smelling Odorants in Food. Role of the Matrix" @default.
- W4242981211 doi "https://doi.org/10.1002/(sici)1096-9888(199708)32:8<807::aid-jms534>3.3.co;2-a" @default.
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