J. Epsztajn et al., APPLICATION OF ORGANOLITHIUM AND RELATED REAGENTS IN SYNTHESIS .17. SYNTHESIS OF AZAISOINDOLO[2,1-A]QUINOLINE DERIVATIVES, Synthesis, (10), 1996, pp. 1212
The synthesis of the 3-hydroxy-5(or 7)-azaisoindolin-1-ones and their
conversion into 2-aryl-2,3-dihydro-3-oxo-1H-azaisoindole-1-acetic acid
s, and their subsequent cyclization via sequential treatment with oxal
yl chloride and aluminium chloride as a way of regiospecific transform
ation of pyridinecarboxylic acids into the corresponding dihydroazaiso
indolo[2,1-a]quinolinediones is described.