Synthesis of Enantiopure Benzyl Homoallylamines by Indium-Mediated Barbier-Type Allylation Combined with Enzymatic Kinetic Resolution: Towards the Chemoenzymatic Synthesis of N-Containing Heterocycles
作者:Ari Hietanen、Tiina Saloranta、Sara Rosenberg、Evelina Laitinen、Reko Leino、Liisa T. Kanerva
DOI:10.1002/ejoc.200901216
日期:2010.2
N-(dimethylsulfamoyl)-protected aldimines with a number of allyl bromides followed by high-yielding deprotection afforded allylic amines in good to excellent yields. The racemic amines were then subjected to enzymatic kinetic resolution in order to obtain the corresponding (S)-amines and (R)-amides. When acyl donors with a terminal double bond were applied in the enzymatic kinetic resolution, the product amide
Barbier 型铟介导的不同 N,N-(二甲基氨磺酰基)-保护的醛亚胺与许多烯丙基溴的烯丙基化,然后进行高产率脱保护,以良好到极好的产率提供烯丙胺。然后对外消旋胺进行酶动力学拆分以获得相应的(S)-胺和(R)-酰胺。当具有末端双键的酰基供体应用于酶动力学拆分时,产物酰胺可以通过闭环复分解以直接的方式转化为不饱和内酰胺。此外,对映体纯的 (S)-1-苯基丁-3-烯胺被转化为相应的二烯丙胺,然后进行闭环复分解以产生模拟许多天然产物的取代脱氢哌啶。