摘要
按Koenigs Knorr方法将四乙酰溴代半乳糖分别与 3 乙酰基卓酚酮和 3 乙酰胺基卓酚酮以Ag2 CO3 为催化剂反应合成了 β 构型糖苷。由于卓酚酮存在互变异构 ,糖基化物亦为 2种异构产物。应用元素分析、核磁共振、红外光谱表征了它们的结构。分析结果表明 ,所得到的化合物是含有卓酚酮基团的四乙酰基 β 构型半乳糖苷。
Acetyl galactopyranosides were obtained by the reaction of 3-acetyl tropolone and 3-acetamido- tropolone with acetyl-α-D-galactopyranosyl bromide,respectively, using AgCO_3 as catalyst. Because of the tautomerism of tropolone molecule there were two isomeric products corresponding to the two starting materials prepared by Koenigs-Knorr glycosidation. The structure of these products was confirmed by elemental analysis, IR and ~1H NMR spectra. The results confirmed the products obtained were acetyl galactopyranosides compounds containing tropolone moiety.
出处
《应用化学》
CAS
CSCD
北大核心
2004年第5期502-505,共4页
Chinese Journal of Applied Chemistry
