A rearrangement of 7-aryloxazolo[5,4-b]pyridines to benzo[c][1,7]naphthyridine-4(3H)-ones and thieno[3,2-c][1,7]naphthyridine-6(7H)-ones.

In this work we describes the development of the rearrangement for 7-aryl substituted oxazolo[5,4-b]pyridines treated with aluminum chloride into synthetically hard-to-reach benzo[c][1,7]naphthyrid...