Swirska, Alicja published the artcileFuran derivatives of 3,5-diiodo-1,4-dihydro-4-oxo-1-pyridineacetic acid, Name: 2-(3,5-Diiodo-4-oxopyridin-1(4H)-yl)acetic acid, the publication is Acta Poloniae Pharmaceutica (1962), 19(6), 549-52, database is CAplus.
I and II were prepared and tested as radiopaque contrast media with neg. results. Na 3,5-diiodo-1,4-dihydro-4-oxo-1-pyridineacetate (21.3 g.), 11.1 g. 5-iodofurfural, and 60 ml. Ac2O was heated at 130-5° for 6 hrs., the mixture diluted with 30 ml. H2O and steam-distilled, and the residue acidified with HCl to give 33.5 g. (crude) I, m. 162-3° (decomposition) (MeOH). (3,5-Diiodo-1,4-dihydro-4-oxo-1-pyri-dineacetyl)hydrazine (0.02 mole) was dissolved in 700 ml. H2O and 10 ml. H2SO4 and the solution rapidly cooled to 30-40°, treated with 0.02 mole of a furan aldehyde in 200 ml. MeOH, and refluxed (or left at room temperature ) 1 hr. to yield II (R, reaction temperature, % yield, and m.p. (decomposition) given): iodo, 90-5°, 95, 251-2° (dilute C5H5N); Br, 90-5°, 97, 245-6° (dilute C5H5N); NO2, 80-90°, 92, 263-4° (dilute C5H5N); Me, 20-5°, 84, 262-4° (dilute C5H5N); H, 20-5°, -, 205-6° (dilute AcOH).
Acta Poloniae Pharmaceutica published new progress about 101-29-1. 101-29-1 belongs to iodides-buliding-blocks, auxiliary class Pyridine,Iodide,Carboxylic acid,Ketone, name is 2-(3,5-Diiodo-4-oxopyridin-1(4H)-yl)acetic acid, and the molecular formula is 0, Name: 2-(3,5-Diiodo-4-oxopyridin-1(4H)-yl)acetic acid.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com