A Different Route to the Synthesis of 9,10-Disubstituted Phenanthrenes.

TEMPESTI, T. C; PIERINI, A. B.; BAUMGARTNER, M.T.*

American Chemical Society

Lugar: Washington, DC; Año: 2005 vol. 70 p. 6508 - 6508

e here report the synthesis of 10-aryl-9-hydroxy and 10-aryl-9-aminophenanthrenes by reaction of the anions of 9-phenanthrol and 9-aminophenanthrene, respectively, with aryl halides (iodobenzene, 4-iodoanisole, 9-bromophenantrene). Good yields of 9,10-disubstituted phenanthrenes were obtained in these reactions (>75% and 50% for the 9-amino and 9-hydroxyphenanthrene rings, respectively). Extension of the procedure to the reaction of both anions with o-dihalobenzenes leads to the synthesis of the ring closure products (aza- or oxa-indeno[1,2-l]phenanthrene) which bear a pentacyclic aromatic condensed ring system, although in lower overall yields (35%).