A deep cavitand catalyzes DielsâAlder reactions of bound maleimides via activation of the dienophile by interaction with the organized hydrogen bonding network at the cavitand rim. Rapid inâout exchange of reactant and product allows efficient turnover. The increase in steric bulk of the reaction product lessens its binding affinity, reducing (and in some cases completely eliminating) product inhibition.
一种深空穴剂通过与空穴剂边缘的有组织氢键网络相互作用激活亲二烯,从而催化结合马来
酰亚胺的 DielsâAlder 反应。反应物和生成物的快速进出交换实现了高效周转。反应产物立体体积的增加会降低其结合亲和力,从而减少(有时甚至完全消除)对产物的抑制。