Synthesis of substituted 6H-benzo[c]chromenes: a palladium promoted ring closure of diazonium tetrafluoroborates

• Jing Zhou, 
• Liang-Zhu Huang, 
• You-Qiang Li, 
• Zhen-Ting Du

Tetrahedron Letters, Volume 53, Issue 52, 26 December 2012, Pages 7036–7039

http://dx.doi.org/10.1016/j.tetlet.2012.10.038