257-08-9Relevant articles and documents
KOtBu mediated efficient approach for the synthesis of fused heterocycles via intramolecular O-/N-arylations
Singha, Raju,Ahmed, Atiur,Nuree, Yasin,Ghosh, Munmun,Ray, Jayanta K.
, p. 50174 - 50177 (2015/06/25)
A novel and efficient methodology for the synthesis of 6H-benzo[c]chromenes, 6H-benzo[c]chromen-6-ones, carbazoles, dibenzofurans, dibenzooxepins has been developed. The reaction goes through intramolecular O-/N-arylations with sp2C-Br bonds via typical SNAr pathway in presence of potassium-tert-butoxide base.