Novel sequential Betti–Ullmann and Betti–C–H activation reactions for the synthesis
of 12H-benzo[a]xanthenes and dihydro-1H-naphtho[1,2-e][1,3]oxazines have been developed. Depending on the used conditions selective Ullmann-type
arylation or α-C-H aryloxylation of 2-bromophenyl alkylaminonaphthols occurred. A
simple, fast, green, and high-yielding method for the synthesis of aminonaphthols
catalyzed by bismuth(III) chloride under solvent-free conditions is reported.
Key words
chemoselective reactions - sequential reactions - Betti reaction - Ullmann reaction
- C–H activation reaction - bismuth (III) chloride - solvent-free reactions