Modular strategy for the synthesis of functionalized aryl-fused azabicyclo[2.2.2]octanes via radical-mediated cascade cyclization
作者:Helena C. Malinakova、Sandeep N. Raikar、Lucas F. McCormick
DOI:10.1016/j.tetlet.2014.05.001
日期:2014.7
A two-step synthesis of rare 2-azabicyclo[2.2.2]octanes is described. N-propargyl amides obtained via Cu(I)-catalyzed three-component coupling, underwent radical-mediated cascade cyclization to afford 5,6-aryl-fused 2-azabicyclo[2.2.2]octanes with arylidene functionality on the two-carbon bridge in 43–62% yields. Phenylidene and 1-naphtylidene derivatives were obtained exclusively as Z diastereomers