Several achiral templates have been evaluated in chiral Lewis acid mediated enantioselective Diels-Alder reactions. Templates such as pyrrolidinones and pyrazolidinones that are capable of forming six-membered chelates with the Lewis acid exhibited the best reactivity and highest selectivity.
已经在手性
路易斯酸介导的对映选择性狄尔斯-阿尔德反应中评估了几种非手性模板。能够与
路易斯酸形成六元螯合物的
吡咯烷酮和
吡唑烷酮等模板表现出最好的反应性和最高的选择性。