Visible-Light-Induced Dehydrohalogenative Coupling for Intramolecular α-Alkenylation: A Way to Build Seven- and Eight-Membered Rings
作者:Dawen Xu、Han Li、Guangxing Pan、Pan Huang、Jens Oberkofler、Robert M. Reich、Fritz E. Kühn、Hao Guo
DOI:10.1021/acs.orglett.0c01391
日期:2020.6.5
with cyclobutane and cyclobutene being involved as key intermediates. This transformation is broadly applicable and highly stereoselective, yielding exclusively cyclic (1Z,3Z)-1,3-diene via photochemically allowed disrotation. This protocol excavates new applications of [2 + 2]-photocycloadditions, which may find their way in future olefin–olefin coupling reactions and medium-sized ring synthesis.