Synthesis of 3-amino-2,3,6-trideoxy-ll-lyxo-hexose (daunosamine) hydrochloride from d-glucose
作者:Gábor Medgyes、János Kuszmann
DOI:10.1016/s0008-6215(00)80395-x
日期:1981.6
approaches starting from 1,2-O-isopropylidene-α- d -glucofuranose were tested for the synthesis of daunosamine hydrochloride (24), the sugar constituent of the antitumor antibiotics daunomycin and adriamycin. The third route, affording 24 in ~5% overall yield in 11 steps, constitutes a useful, preparative synthesis, 3,5,6-Tri-O-benzoyl-1,2-O-isopropylidene-α- d -glucofuranose was converted via methyl
摘要试验了从1,2-O-异亚丙基-α-d-葡萄糖呋喃糖开始的三种不同方法,用于合成盐酸道豆胺(24),抗肿瘤抗生素道诺霉素和阿霉素的糖成分。第三种路线可在11个步骤中以约5%的总收率提供24,构成了有用的制备性合成,将3,5,6-Tri-O-苯甲酰基-1,2-O-异亚丙基-α-d-葡萄糖呋喃糖转化了通过甲基2,3-脱水-β-d-甘露呋喃糖苷转化为甲基2,3:5,6-双脱水-α-1-L-呋喃呋喃糖苷,其末端环氧乙烷环经硼氢化物还原后选择性拆分,得到甲基2, 3-脱水-6-脱氧α-1-1-呋喃呋喃糖苷(31)。化合物31转化为2,3,3-脱水-5-O-苄基-6-脱氧-α-1-L-呋喃呋喃糖苷甲基,经氢化铝锂处理后在C-2选择性还原。得到甲基5-O-苄基-2,6-二脱氧-α-1-木糖六呋喃糖苷。随后的甲磺酰化,然后用叠氮化物置换中甲氧基,并进行转化,得到甲基3-叠氮基-5-O-苄基-2,6-二脱