Regio- and Diastereoselective Spirocyclopropanation of Benzofuran-Derived Azadienes through 1,4-Addition-Induced Dearomatization Reaction under Mild Conditions
A Cs2CO3-mediated [2 + 1] cycloaddition of benzofuran-derived azadienes (BDAs) with bromomalonate by using a dearomatization strategy has been developed. Through this process, BDAs serve as a potential 2-atom synthon in the construction of a range of functionalized spirocyclopropane derivatives, such as spirobenzofuran-2-cyclopropanes and spiroindane-2-cyclopropanes.
通过使用脱芳香化策略,已开发出Cs 2 CO 3介导的苯并呋喃衍生的氮杂二烯(BDA)与溴丙二酸酯的[2 +1]环加成反应。通过此过程,BDA在构建一系列功能化的螺环丙烷衍生物(如螺苯并呋喃-2-环丙烷和螺茚满-2-环丙烷)中充当潜在的2原子合成子。