作者:Akimi Ben、Day-Shin Hsu、Takashi Matsumoto、Keisuke Suzuki
DOI:10.1016/j.tet.2011.06.046
日期:2011.9
Total synthesis of the unnatural enantiomer of deacetylravidomycin M was accomplished. The key steps include, (1) aryl C-glycosidation of the azido-bearing fucosyl acetate 2 by using catalytic Sc(OTf)3, (2) the [2+2] cycloaddition reaction of alkoxybenzyne bearing an azido sugar to ketene silyl acetal, and (3) the ring expansion reaction of alkoxybenzocyclobutenone. The synthesis revealed that the
完成了脱乙酰基雷维霉素M的非天然对映异构体的全合成。关键步骤包括:(1)使用催化Sc(OTf)3对叠氮基岩藻糖基乙酸酯2进行芳基C-糖基化,(2)带有叠氮糖的烷氧基苯并[2 + 2]环加成反应与乙烯酮甲硅烷基缩醛(3)烷氧基苯并环丁烯酮的扩环反应。合成表明,天然产物不是拟议的胺,而是相应的N-氧化物。