A synthetic strategy based on the sequential application of an aromatic aza-Claisen
rearrangement and an intramolecular Heck reaction as the key steps has been developed
for the synthesis of various new coumarin- and quinolone-annulated benzazocinone derivatives
in 60–70% yields.
Key words
heterocycles - annulations - ring closure - rearrangements - catalysis - Heck reactions