A surprising C-4 epimerization of 5-deoxy-5-sulfonylated pentofuranosides under Ramberg–Bäcklund reaction conditions
摘要:
Treatment of methyl 5-deoxy-2,3-O-isopropylidene-5-(benzylsulfonyl)-beta-D-ribofuranoside with CBr2F2-KOH/Al2O3 afforded the corresponding olefinic sugar. The methyl- and the isopropyl-analogues in contrast underwent epimerization at C-4 to generate the alpha-L-lyxo derivatives. (C) 2008 Elsevier Ltd. All rights reserved.
A surprising C-4 epimerization of 5-deoxy-5-sulfonylated pentofuranosides under Ramberg–Bäcklund reaction conditions
作者:Tarun Kumar Pal、Tanmaya Pathak
DOI:10.1016/j.carres.2008.08.010
日期:2008.11
Treatment of methyl 5-deoxy-2,3-O-isopropylidene-5-(benzylsulfonyl)-beta-D-ribofuranoside with CBr2F2-KOH/Al2O3 afforded the corresponding olefinic sugar. The methyl- and the isopropyl-analogues in contrast underwent epimerization at C-4 to generate the alpha-L-lyxo derivatives. (C) 2008 Elsevier Ltd. All rights reserved.