Arylnitroso dienophiles exist in equilibrium with their dimeric counterparts, which in turn form stable bidentate complexes with scandium(III) triflate and react with cyclohexadiene to give the corresponding Diels-Alder adduct at the same rate as the normal thermal process.
芳基亚硝基二烯亲和体与其二聚体对应体平衡存在,后者与
三氟甲磺酸scan(III)形成稳定的二齿络合物,并与环
己二烯反应生成相应的Diels-Alder加合物,其反应速率与常规热过程相同。