期刊
CARBOHYDRATE RESEARCH
卷 511, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2021.108494
关键词
Sialic acid; Oxidative cleavage; Lattrell-Dax reaction; Furanolactone; Conformational analysis
资金
- NIH [GM62160]
This study describes a novel oxidative fragmentation reaction of methyl ester in DMF with sodium nitrite, yielding a new compound with high yield. Furthermore, another new compound is obtained through the reaction of the same ester with sodium carbonate. Reduction and acetylation of the lactone result in a peracetylated aminodeoxyheptitol with a zig zag conformation of its carbon backbone.
We describe the novel oxidative fragmentation of methyl (5-acetamido-4,7,8,9-tetra-O-acetyl-5-deoxy-3-O-trifluoromethanesulfonyl-beta-D-erythro-L-gluco-2-nonulopyranos)onate 2 on stirring with sodium nitrite in DMF to give the novel 3-acetamido-2,5,6,7-tetra-O-acetyl-D-glycero-D-galacto-heptono-1,4-lactone 3 in excellent yield. Stirring of the same triflate with sodium carbonate on the other hand affords the novel methyl (5-acetamido-7,8,9-tri-O-acetyl-3,6-anhydro-5-deoxy-D-manno-3-ene-2-nonulos)onate 19 also in excellent yield. Reduction of the heptono lactone with sodium borohydride followed by acetylation gives a peracetylated aminodeoxyheptitol 6 that adopts the zig zag conformation of its carbon backbone.
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