Easy access to C-glycosides from aldonolactones by a Claisen-type chain-extension reaction
作者:René Csuk、Martin Kühn、Dieter Ströhl
DOI:10.1016/s0040-4020(96)01079-4
日期:1997.1
Chain elongated 2,4-diuloses 2, 4, 6, 9–11, 24, 25 were conveniently obtained from the corresponding aldonolactones 1, 3, 5 by their reaction with carbonyl compounds in the presence of sodium hydride. These hemiacetalic products can be transformed into C-glycosides by deoxygenation with Et3SiH/BF3·Et2O.
链伸长2,4- diuloses 2,4,6,9-11,24,25被方便地从对应aldonolactones得到1,3,5可以通过与在氢化钠的存在下羰基化合物反应。这些半缩醛产物可通过用Et 3 SiH / BF 3 ·Et 2 O脱氧而转化为C-糖苷。