Diazepines and naphthyridines from the rearrangement of thienoindolizidinone oximes

Abstract
Thienoindolizidinone oximes previously reported [1] were treated with polyphosphoric acid and led to thienopyrrolidinodiazepines or thienonaphthyridines. The rearrangement depends on the structural form of the starting oxime and the results obtained are discussed.