Synthetically useful aryl-aryl bond formation via Grignard generation and trapping of arynes. A one-step synthesis of p-terphenyl and unsymmetrical biaryls
Palladium-Catalyzed Annulation of <i>o</i>-Iodobiphenyls with <i>o</i>-Bromobenzyl Alcohols: Synthesis of Functionalized Triphenylenes via C–C and C–H Bond Cleavages
作者:Masayuki Iwasaki、Shohei Iino、Yasushi Nishihara
DOI:10.1021/ol4025869
日期:2013.10.18
Treatment of o-iodobiphenyls with abromobenzyl alcohols in the presence of cesium carbonate under palladium catalysis affords a series of highly substituted triphenylenes. The reaction involves two C-C bond formations and C-C and C-H bond cleavages. A combination of palladium and an electron-deficient phosphine ligand proves to be effective for both decarbonylative cross-coupling and intramolecular cyclization.
HART, H.;HARADA, KATSUMASA;DU, CHI-JEN, F., J. ORG. CHEM., 1985, 50, N 17, 3104-3110