炔丙醇和胺是有机合成中的通用组成部分。我们展示了一种简单的酶级联反应,可以从容易获得的外消旋起始材料合成对映异构纯的炔丙醇和胺。在第一步中,来自Agrocybe aegerita的过氧化酶将外消旋炔丙醇转化为相应的酮,然后使用来自开菲尔乳杆菌的 ( R )-选择性醇脱氢酶或 ( S )-选择性醇脱氢酶将其转化为对映体纯醇来自布罗基热厌氧菌. 此外,使用来自土曲霉的( R )-选择性胺转氨酶或来自紫色色杆菌的( S )-选择性胺转氨酶,建立了将外消旋醇酶促Mitsunobu型转化为对映体富集的炔丙基胺。一锅两步级联反应以 70-99% 的产率产生了范围广泛的对映体富集的醇和胺产物。
Merging Nucleophilic and Hydrogen Bonding Catalysis: An Anion Binding Approach to the Kinetic Resolution of Propargylic Amines
作者:Eric G. Klauber、Chandra Kanta De、Tejas K. Shah、Daniel Seidel
DOI:10.1021/ja105337h
日期:2010.10.6
An efficient kinetic resolution of primary propargylic amines with s-factors of up to 56 is reported. The strategy is based on a dual catalytic approach, namely the use of a newly developed and easy-to-make thiourea-amide anion binding catalyst in combination with 4-(dimethylamino)pyridine (DMAP), both employed at a 5 mol% catalyst loading. Benzylic amines are also resolved with s-factors of up to 38.