Synthesis of 2′-deoxyribofuranosyl indole nucleosides related to the antibiotics SF-2140 and neosidomycin
作者:Nabih S. Girgis、Howard B. Cottam、Roland K. Robins
DOI:10.1002/jhet.5570250202
日期:1988.3
The 2′-deoxyribofuranose analog of the naturally occurring antibiotics SF-2140 and neosidomycin were prepared by the direct glycosylation of the sodium salts of the appropriate indole derivatives, with 1-chloro-2- deoxy-3,5-di-O-p-toluoyl-α-D-erythropentofuranose (5). Thus, treatment of the sodium salt of 4-methoxy-1H- indol-3-ylacetonitrile (4a) with 5 provided the blocked nucleoside, 4-methoxy-1-(2-deoxy-3
天然存在的抗生素SF-2140和新西霉素的2'-脱氧核糖呋喃糖类似物是通过适当的吲哚衍生物的钠盐与1-氯-2-脱氧-3,5-二-O -p直接糖基化制备的甲苯甲酰-α-D- erythropentofuranose(5)。因此,处理4-甲氧基- 1的钠盐的ħ -吲哚-3-基乙腈(4A与)5提供的被保护的核苷,4-甲氧基-1-(2-脱氧-3,5-二- ø - p甲苯甲酰-β-D-赤藓)-1 ħ吲哚-3-基乙腈(6a中),将其用甲醇钠处理,得到的SF-2140类似物,4-甲氧基-1-(2-脱氧β-D-赤藓)-1 ħ -吲哚-3-基乙腈(图7a)。所述neosidomycin类似物(8)的制备是通过治疗1个钠盐ħ吲哚-3-基乙腈(4B)与5以得到阻止中间体1-(2-脱氧-3,5-二- ø - p -甲苯酰基β-D-赤藓)-1 ħ吲哚-3- ylace-tonitrile(图6b),接着加入甲醇钠处