Novel glycosylation of the nitroxyl radicals with peracetylated glycosyl fluorides using a combination of BF3·OEt2 and an amine base as promoters
作者:Shingo Sato、Toshihiro Kumazawa、Shigeru Matsuba、Jun-ichi Onodera、Masaaki Aoyama、Heitaro Obara、Hitoshi Kamada
DOI:10.1016/s0008-6215(01)00184-7
日期:2001.8
Glycosylation of the nitroxyl radicals, 4-acetoxy-2,2,6,6-tetramethylpiperidin-1-oxyl (4-acetoxy-TEMPO) and 3-carbamoyl-2,2,5,5-tetramethylpyrollin-1-oxyl (3-carbamoyl-PROXYL) with peracetylglycosyl fluoride as the glycosyl donor, in the presence of boron trifluoride diethyl etherate (BF(3) x OEt(2)) and an amine base afforded the corresponding hydroxylamine-O-glycosides in 25-100% yields.
硝基氧基,4-乙酰氧基-2,2,6,6-四甲基哌啶-1-氧基(4-乙酰氧基-TEMPO)和3-氨基甲酰基-2,2,5,5-四甲基吡咯烷-1-氧基的糖基化(3 -氨基甲酰基-PROXYL)与过乙酰基糖基氟作为糖基供体,在三氟化硼二乙基醚化物(BF(3)x OEt(2))和胺碱的存在下,以25-100%的产率提供了相应的羟胺-O-糖苷。