Stewart, Georgina M. published the artcileSynthesis of substituted 9-oxo-9,10-dihydroacridine-4-carboxylic acids. I. Factors affecting the direction of ring closure of substituted N-(2-carboxyphenylamino)benzoic acids, Quality Control of 145343-76-6, the publication is Australian Journal of Chemistry (1984), 37(9), 1939-50, database is CAplus.
The cyclodehydration of (2-carboxyphenylamino)benzoic acids I (R = NO2, CO2H, Cl, Br, etc.) by H2SO4, POCl3, or by Et polyphosphate to give mixtures of dihydroacridinecarboxylic acids II and III depended on the electronic and steric effects of R. Judicious choice of substituent and cyclizing reagent gave a large excess of 1 isomer.
Australian Journal of Chemistry published new progress about 145343-76-6. 145343-76-6 belongs to iodides-buliding-blocks, auxiliary class Chloride,Iodide,Carboxylic acid,Benzene, name is 2-Chloro-4-iodobenzoic acid, and the molecular formula is C22H12F6O6S2, Quality Control of 145343-76-6.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com