Total Asymmetric Synthesis of Taxol by Dehydration Condensation between 7-TES Baccatin III and Protected N-Benzoylphenylisoserines Prepared by Enantioselective Aldol Reaction
作者:Isamu Shiina、Katsuyuki Saitoh、Isabelle Fréchard-Ortuno、Teruaki Mukaiyama
DOI:10.1246/cl.1998.3
日期:1998.1
asymmetric synthesis of Taxol was completed by dehydration condensation between a protected N-benzoylphenylisoserine 4 or 9 and 7-TES baccatin III which was prepared from 8-membered ring enone. Taxol side chains 4, 7, 9 and 11, optically active protected N-benzoylphenylisoserines, were successfully synthesized by enantioselective aldol reaction from two achiral starting materials, benzaldehyde and an enol
紫杉醇的全不对称合成是通过受保护的 N-苯甲酰基苯基异丝氨酸 4 或 9 与 7-TES 浆果赤霉素 III 之间的脱水缩合完成的,后者由 8 元环烯酮制备。紫杉醇侧链 4、7、9 和 11,即光学活性保护的 N-苯甲酰基苯基异丝氨酸,通过对映选择性羟醛反应从两种非手性原料苯甲醛和衍生自 S-乙基苄氧基乙硫酸酯的烯醇甲硅烷基醚成功合成。