Aluminum(III) complexes derived from aminotriphenolate ligands are shown to be excellent catalysts for the formation of cyclic sulfites from a range of (functionalized) terminal and internal epoxides, and ex situ generated sulfur dioxide. The developed catalytic protocol is characterized by its operational simplicity, wide scope in epoxide reaction partners, good to excellent isolated yields and mild
已显示衍生自
氨基三
酚盐
配体的铝(III)络合物是出色的催化剂,可用于从一系列(官能化的)末端和内部
环氧化物形成环
亚硫酸盐,并在异位生成
二氧化硫。发达的催化方案的特点是操作简单,在
环氧化物反应伙伴中适用范围广,分离产率好至极好以及反应条件温和[50-70°C,p(SO 2)<1 bar]。这些环状亚硫酸盐在有机合成中的合成潜力通过三步操作流程在N取代的
氮丙啶的制备中得到了证明。