posted on 2021-10-11, 14:43authored byFelicity
J. Frank, Paul G. Waddell, Michael J. Hall, Julian G. Knight
3,5-Diiodo-8-aryl-BODIPYs
are prepared from the corresponding 3,5-dichloro-
and 3,5-dibromo- congeners via a double aromatic Finkelstein reaction
with NaI in refluxing propionitrile, in yields from 51 to 100%. Rate
enhancement is observed for 3,5-dibromo-BODIPYs (ArBr > ArCl) suggesting
a concerted SNAr mechanism for this transformation. Thus
formed 3,5-diiodo-BODIPYs are examined as coupling partners in Migita–Kosugi–Stille,
Mizoroki–Heck, Sonogashira, and Suzuki–Miyaura reactions,
providing routes toward complex BODIPY architectures.