β-C-glycopyranosyl aldehydes from d-glucose, d-mannose, and d-galactose. The key step in the synthesis of C-glycosyl aldehydes is the aryl driven reductive dehydration on 1-phenyl-2-(2′,3′,4′,6′-tetra-O-acetyl-β-d-glycopyranosyl)ethanone to afford alkenes, which on oxidation afford the desired compounds in good yield. β-C-Glycopyranosyl aldehydes have been converted to 2,6-anhydro-heptitols in quantitative
已经开发了一种从d-
葡萄糖,d-
甘露糖和d-半
乳糖非对映选择性合成β- C-
甘露糖基醛的简便方法。合成C-糖基醛的关键步骤是在1-苯基-2-(2',3',4',6'-四-O-乙酰基-β - d-
甘露糖基)乙酮上由芳基驱动的还原脱
水得到烯烃,该烯烃在氧化时以高收率得到所需化合物。β- C- Glycopyranosyl醛已定量转化为2,6-脱
水庚糖醇。衍生自d-
甘露糖和d的2,6-脱
水庚糖醇-半
乳糖是对映异构体,并且是用于合成具有互补性手性的大环/两亲物的有用的接头。