Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India.
Carbohydr Res. 2008 Nov 3;343(16):2826-9. doi: 10.1016/j.carres.2008.08.010. Epub 2008 Aug 12.
Treatment of methyl 5-deoxy-2,3-O-isopropylidene-5-(benzylsulfonyl)-β-D-ribofuranoside with CBr(2)F(2)-KOH/Al(2)O(3) afforded the corresponding olefinic sugar. The methyl- and the isopropyl-analogues in contrast underwent epimerization at C-4 to generate the α-L-lyxo derivatives.
用 CBr(2)F(2)-KOH/Al(2)O(3)处理 5-脱氧-2,3-O-亚异丙基-5-(苯磺酰基)-β-D-核糖呋喃苷得到相应的烯烃糖。相比之下,甲基和异丙基类似物在 C-4 位发生差向异构化生成α-L-岩藻糖衍生物。