The one step synthesis of β-d-C-glycosidic ketones by condensation of pentane-2,4-dione with unprotected N-acetyl-d-gluco-, manno-, and galactosamine in alkaline aqueous media has been explored. N-Acetyl-d-gluco- and mannosamine gave, in good yield, a mixture of the two gluco and manno C-glycosidic ketones, which were separated by crystallization after acetylation, whereas N-acetyl-d-galactosamine afforded the galacto C-glycosidic ketone which was isolated as its acetylated derivative in 50% yield.
研究人员探索了在碱性
水介质中通过
戊烷-2,4-二酮与未受保护的 N-乙酰基-d-
葡糖、
甘露糖和半
乳糖胺缩合一步合成 δ-d-C-糖苷酮的方法。N- 乙酰基-d-
葡糖和甘露胺以良好的收率得到了两种
葡糖和甘露 C-糖苷酮的混合物,乙酰化后通过结晶将其分离,而 N- 乙酰基-d-半
乳糖胺则得到了半
乳糖 C-糖苷酮,并以 50%的收率分离出其乙酰化衍
生物。