Benzannulation from alkynes and allyl tosylates via a pi-allylpalladium intermediate
[reaction: see text] Allyl tosylate is a good allyl source for a novel palladium-catalyzed benzannulation that affords polysubstituted benzenes from 1 mol of an allyl compound and 2 mol of internal alkynes. Using triphenyl phosphite as a ligand, the reaction with terminal alkynes gave trisubstituted benzenes regioselectively.
Tsukada
N
Department of Materials Chemistry, Graduate School of Engineering, Tohoku University, Sendai, Japan. tsukada@aporg.che.tohoku.ac.jp
Sugawara
S
Inoue
Y