1,2;5,6-双-O-异丙叉基-3-C-硝甲基-α-D-呋喃阿洛糖（化合物1）在酸性条件下选择性脱除5,6-异丙叉基得到C-3位构型保持的水解产物1,2-O-异丙叉基-3-C-硝甲基-α-D-呋喃阿洛糖（化合物2）；化合物1先经过Moffatt脱水生成C-3硝基烯产物1,2;5,6-双-O-异丙叉基-3-脱氧-亚甲基硝基-α-D-呋喃木糖（化合物3），然后在酸性条件下选择性脱除5,6-异丙叉基过程中协同发生氧杂-Michael加成反应得到C-3位构型反转的水解产物1,2-O-异丙叉基-3-C-硝甲基-α-D-呋喃葡萄糖（化合物2′），两种产物化合物2和2′互为C-3差向异构体.通过1H NMR、13C NMR、DEPT-135、1H-1H COSY、gHSQC和gHMBC等核磁共振（NMR）技术，对化合物2′的1H和13C NMR数据进行了全归属．
刘宏民
,
孙伟
,
李鹏云
,
张恩
,
崔得运
,
徐锦梅
. 呋喃阿洛糖衍生物水解产物的结构确定[J]. 波谱学杂志, 2017
, 34(2)
: 183
-190
.
DOI: 10.11938/cjmr20170207
1,2-O-(1-methylethylidene)-3-C-methylnitro-α-D-allofuranose (2) was obtained through selective deprotection of 1,2;5,6-Di-O-isproplidene-3-C-methylnitro-α-D-allofuranose (1) under an acidic condition. C-3 nitrostyrenes (3) was synthetized through Moffatt dehydration from compound 1 under an acidic condition. A hydrolysis product 1,2-O-(1-methylethylidene)-3-C-methylnitro-α-D-glocufuranose (2') which had a reversed C-3 configuration was obtained by an unexpected oxa Michael addition. Compounds 2 and 2' were C-3 diasteroisomers. Compound 2' was characterized with NMR spectroscopy techniques, including 1H NMR, 13C NMR, DEPT-135, 1H-1H COSY, gHSQC and gHMBC. 1H and 13C chemical shifts of compound 2' were also fully assigned. The molecular structure of compound 2' was determined.
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