Chemoenzymatic Synthesis of Chiral 1-Benzyl-5-(hydroxymethyl)-2-piperidone Enabled by Lipase AK-Mediated Desymmetrization of Prochiral 1,3-Diol and Its Diacetate
作者:Duc Thinh Khong、Varsha Siri Pamarthy、Timothy Gallagher、Zaher M. A. Judeh
DOI:10.1002/ejoc.201600262
日期:2016.6
The synthesis of (R)-1-benzyl-5-(hydroxymethyl)-2-piperidone (1) from key synthon monoacetate (R)-3 has been accomplished conveniently in 6 steps with 93 % ee and in 44 % overall yield. The key step involved lipase AK-mediated desymmetrization of diol 4 to produce monoacetate (R)-3 in 93 % ee and 93 % yield. Additionally, lipase AK-mediated desymmetrization of diacetate 5 readily provided access to
从关键合成子单乙酸酯 (R)-3 合成 (R)-1-苄基-5-(羟甲基)-2-哌啶酮 (1) 已通过 6 个步骤方便地完成,ee 为 93%,总产率为 44%。关键步骤涉及脂肪酶 AK 介导的二醇 4 去对称化,以 93% ee 和 93% 产率生产单乙酸酯 (R)-3。此外,脂肪酶 AK 介导的二乙酸酯 5 去对称化很容易以 93% ee 和 54% 产率获得单乙酸酯 (S)-3。