Journal of Carbohydrate Chemistry p. 241 - 253 (1999)
Update date:2022-08-05
Topics:
Lee, C. Kuan
Kang, H. Chuan
Linden, Anthony
The reaction of 6-O-acetylsucrose with sulfuryl chloride was reexamined. The major product, after dechlorosulfation and acetylation, was determined by X-ray diffraction to be 2,3,6-tri-O-acetyl-4-chloro-4-deoxy-α-D-galactopyranosyl 3-O-acetyl-1,4,6-trichloro-1,4,6-trideoxy-β-D-tagatofuranoside and not the corresponding sorbofuranoside, as reported earlier. The mechanism of chlorination at C-4′ is discussed. The intensity of sweetness of the free 4′-chlorodeoxy tagato isomer is determined to be only about one-tenth the sweetness of the corresponding chlorodeoxy fructo isomer, which strongly suggests that the hydrophobic γ-site is located at C-4′.
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