Novel asymmetric synthesis of oseltamivir phosphate (Tamiflu) from (−)-shikimic acid via cyclic sulfite intermediates
作者:Liang-Deng Nie、Xiao-Xin Shi、Na Quan、Fei-Feng Wang、Xia Lu
DOI:10.1016/j.tetasy.2011.09.014
日期:2011.9
A novel asymmetric synthesis of oseltamivir phosphate 1 from the naturally abundant (−)-shikimic acid via 3,4-cyclic sulfite intermediate 3 (Scheme 1) is described. Target compound 1 was obtained in 39% overall yield from this nine-step synthesis, and the characteristic step of the synthesis is the regio- and stereospecific nucleophilic substitution with sodium azide at the allylic (C-3) position of
描述了通过3,4-环亚硫酸盐中间体3从天然丰富的(-)ki草酸中合成新的磷酸奥司他韦1的不对称合成(方案1)。通过该九步合成,以39%的总收率获得了目标化合物1,合成的特征步骤是在3,4-环的烯丙基(C-3)位置用叠氮化钠进行区域和立体特异性亲核取代。亚硫酸盐3。由于来自未保护的二羟基叠氮化物4的直接氮丙啶形成的产率不令人满意,因此通过保护的3,4-环亚硫酸盐10和13改进了所建立的化合物7的两种制备方法。(方案2)已经开发。在这两种改进的制剂,化合物7由3,4-二环状亚硫酸酯得到3中以64%的7-步骤或62%总产率分别。