In this work, we report an unusually concise immobilization of Cinchona organocatalysts using thiol–ene chemistry, in which catalyst immobilization and bead polymerization is combined in a single step. A solution of azo initiator, polyfunctional thiol, polyfunctional alkene and an unmodified Cinchona-derived organocatalyst in a solvent is suspended in water and copolymerized on heating by thiol–ene additions. The resultant spherical and gel-type polymer beads have been evaluated as organocatalysts in catalytic asymmetric transformations.
在这项工作中,我们报告了一种异常简洁的使用硫醇-烯化学方法固定辛可纳有机催化剂的方法,其中催化剂固定和珠状聚合在一个步骤中结合。在溶剂中悬浮着一个偶氮引发剂、多官能硫醇、多官能烯烃和未改性的辛可纳衍生有机催化剂的溶液,然后通过硫醇-烯加成在加热时在水中共聚合。所得的球形和凝胶型聚合物珠被评估为有机催化剂,用于催化不对称转化。