2006
DOI: 10.1021/ja0616433
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A Short Enantioselective Pathway for the Synthesis of the Anti-Influenza Neuramidase Inhibitor Oseltamivir from 1,3-Butadiene and Acrylic Acid

Abstract: A short synthetic pathway has been developed for the synthesis of oseltamivir (1) or the enantiomer (ent-1). The intermediates and conditions for this process are summarized in Scheme 1. The synthesis provides a number of advantages: (1) use of inexpensive and abundant starting materials; (2) complete enantio-, regio-, and diastereocontrol; (3) avoidance of explosive, azide-type intermediates; (4) good overall yield (ca. 30%, still not completely optimized); and (5) scalability.

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Cited by 258 publications
(141 citation statements)
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“…At lower temperature, the reaction is not so easily reversible, and 86% yield can be obtained with TBD-PS after only 24 h at 0 • C (entry 10). The homogeneous catalysts (entries [11][12][13][14] lead to similar or worse results, showing the positive effect of immobilization on the activity, together with the simple work-up of the reaction mixture when using heterogeneous catalysts. In the case of 3bb, 84% yield can be also obtained with TBD-PS at 0 • C (entry 17).…”
Section: Single Step Two: Lactone Alcoholysismentioning
confidence: 96%
See 1 more Smart Citation
“…At lower temperature, the reaction is not so easily reversible, and 86% yield can be obtained with TBD-PS after only 24 h at 0 • C (entry 10). The homogeneous catalysts (entries [11][12][13][14] lead to similar or worse results, showing the positive effect of immobilization on the activity, together with the simple work-up of the reaction mixture when using heterogeneous catalysts. In the case of 3bb, 84% yield can be also obtained with TBD-PS at 0 • C (entry 17).…”
Section: Single Step Two: Lactone Alcoholysismentioning
confidence: 96%
“…In some cases, the synthetic route starts from cyclic materials, as in Shibasaki's [10] and Zutter's [11] methods, in which one of the key steps is the desymmetrization of a meso intermediate, or Trost's synthesis [12], using an asymmetric allylic alkylation as key step. In other cases, one of the key steps is the formation of the cyclohexene ring, for example through an asymmetric Diels-Alder reaction, as in Corey's [13] and Fukuyama's [14] methods. In all cases, the synthetic pathway involves several (nine to 14) steps.…”
Section: Introductionmentioning
confidence: 99%
“…以 L-谷氨酸乙酯为原料, 分别保护羧基和氨基得到 化合物 59, 该化合物在过量甲酸作用下脱除叔丁酯并 进一步形成混合酸酐后用 NaBH 4 还原生成一级醇 60, 再将其氧化成醛后不需纯化, 在 Still-Horner 烯化条件 下高选择性地得到了(Z)-α,β-不饱和酯(62), 紧接着发生 Dieckmann 缩合、还原羰基、脱除烯丙基保护、用 Boc 重新保护生成氨基, 最后消除羟基得到 Corey 合成达菲 的关键中间体 64 [14] .…”
Section: L-谷氨酸为原料合成达菲关键中间体unclassified
“…[18] Eine kürzere und einfachere Route ist beschrieben worden, die das aus 1,3-Butadien und Trifluorethylacrylat in Gegenwart des Katalysators ent-14 A erzeugte Diels-Alder-Addukt verwendet (10 Mol-%, 23 8C, 97 % Ausbeute, > 97 % ee). [19] Der Reaktionsweg zu 27 ist in [19,20] das unter Eliminierung von HI und allylischer Bromierung das Bromlactam 30 in hoher Ausbeute lieferte, das dann mit ethanolischer Base weiter in den Dienester 31 überführt wurde. Bromamidierung [19,21] von 31 und Behandlung mit Base ergaben den Aziridinester 32, aus dem Oseltamivir in zwei Stufen in ca.…”
Section: Enantioselektive Synthese Des Oralen Grippewirkstoffs Oseltaunclassified