作者:Berit Olofsson、Krisztián Bogár、Ann-Britt L. Fransson、Jan-E. Bäckvall
DOI:10.1021/jo0615091
日期:2006.10.1
A divergent synthesis of various 3,5-dioxygenated piperidines with interesting pharmacological properties is described. A mixture of the achiral cis- and racemic trans-3,5-piperidine diol could be efficiently obtained from N-benzylglycinate in five steps by the use of chemoenzymatic methods. In the subsequent enzyme- and Ru-catalyzed reaction, the rac/meso diol mixture was efficiently transformed to
描述了具有令人感兴趣的药理特性的各种3,5-二氧化哌啶的发散合成。通过使用化学酶方法,可以在五个步骤中从N-苄基甘氨酸酯有效地获得非手性顺式-和外消旋的反式-3,5-哌啶二醇的混合物。在随后的酶和Ru催化反应中,rac / meso二醇混合物有效地转化为顺式(3 R,5 S)-二乙酸酯,具有出色的非对映选择性和高收率。顺式-二乙酸酯的进一步转化选择性地递送了顺式-哌啶二醇和顺式-(3 R,5 S)-乙酸羟基酯。或者,可以在单乙酸酯阶段停止DYKAT,得到反式-(3 R,5 R)-乙酸羟基酯。