Visible-light-promoted radical acylation/cyclization of alkynoates with aldehydes for the synthesis of 3-acylcoumarins
作者:Qiumei Wang、Chao Yang、Chao Jiang
DOI:10.1039/c8ob02232a
日期:——
A new, efficient, and atom-economic visible-light-promoted radical acylation/cyclization of alkynoates with aldehydes was developed for the synthesis of 3-acylcoumarins. The reaction undergoes a domino radical addition/5-exo cyclization, and ester migration to afford the product in moderate to good yields with wide functional group tolerance. The significant feature of this new method is the excellent
A new and efficient metal-free tandem acylation/cyclization of alkynoates with aldehydes was developed for the synthesis of 3-acyl-4-arylcoumarins. The reaction was achieved by the addition of acyl radical to alkynes and a C-H bond functionalization to form two new C-C bonds simultaneously.