5-O-Acetyl-2,3,6-trideoxy-3-phthalimido-ß-L-ribo-hexofuranose (2) was converted to its corresponding methyl glycoside 3. After deprotection with 33% methylamine in ethanol and subsequent protection of the amino group with trifluoroacetic anhydride and the hydroxy group with 4-nitrobenzoyl chloride, the resulting compound 5 was transformed into the appropriate glycosyl bromide 7 via the 1-O-acetyl derivative 6. Compound 7 was coupled with daunomycinone in the presence of yellow mercury(II) oxide and mercury(II) bromide.
5-O-乙酰基-2,3,6-三脱氧-3-邻苯二甲
酰亚胺基-β-
L-核糖-
呋喃己糖 (2) 转化为其相应的甲基糖苷 3。用 33%
甲胺的
乙醇溶液脱保护并随后保护用
三氟乙酸酐去除
氨基,用
4-硝基苯甲酰氯去除羟基,所得化合物5通过1-O-乙酰基衍
生物6转化为合适的糖基
溴7。化合物7在黄
汞存在下与
道诺霉素偶联( II)氧化物和
溴化
汞(II)。