Photochemical Cyclopropanation of Cyclooctatetraene and (Poly-)unsaturated Carbocycles
作者:Yujing Guo、Claire Empel、Chao Pei、Iuliana Atodiresei、Thomas Fallon、Rene M. Koenigs
DOI:10.1021/acs.orglett.0c01734
日期:2020.7.2
We report on the use of visible light to conduct carbene-transfer reactions of donor/acceptor diazoalkanes with cyclooctatetraene and polyunsaturated carbocycles to give the corresponding cyclopropanes in excellent yields with excellent stereoselectivities. This photochemical protocol proved to be superior to conventional metal-catalyzed cyclopropanation reactions and now provides platform chemicals
我们报道了使用可见光进行供体/受体重氮烷与环辛酸酯和多不饱和碳环的卡宾转移反应,从而以优异的收率和良好的立体选择性得到相应的环丙烷。事实证明,这种光化学方法优于常规的金属催化的环丙烷化反应,现在可提供含有环状共轭全顺式三烯的平台化学剂。环丙烷是防止6π电环化的重要结构特征。相反,现在可以在环加成反应中将三烯部分选择性官能化。