Malecki, Jan G. et al. published their research in Polyhedron in 2013 | CAS: 486-73-7

Isoquinoline-1-carboxylic acid (cas: 486-73-7) belongs to isoquinoline derivatives. Being an analog of pyridine, isoquinoline is a weak base, with a pKa of 5.14. The Pomeranz–Fritsch reaction provides a method for the preparation of isoquinoline. This reaction uses a benzaldehyde and aminoacetoaldehyde diethyl acetal, which in an acid medium react to form isoquinoline.Name: Isoquinoline-1-carboxylic acid

Ruthenium(II) complexes with quinoline carboxylate as a co-ligand was written by Malecki, Jan G.;Maron, Anna;Gryca, Iza;Mori, Asami;Suzuki, Takayoshi. And the article was included in Polyhedron in 2013.Name: Isoquinoline-1-carboxylic acid This article mentions the following:

Ru(II) complexes [Ru(H/Cl)(CO)(PPh3)2(L)] and cis/trans-[Ru(PPh3)2(L)2] (L = isoquinoline-1-carboxylate or quinoline-2-carboxylate) were synthesized and characterized by IR, 1H, 13C and 31P NMR, UV-visible spectroscopy and x-ray crystallog. The exptl. studies were completed by quantum chem. calculations, which were used to describe the nature of the interactions between the ligands and the central ion, and the orbital compositions in the frontier electronic structures. Based on a MO scheme, the calculated results allowed the interpretation of the UV-visible spectra obtained at an exptl. level. The luminescence properties of the complexes were determined In the experiment, the researchers used many compounds, for example, Isoquinoline-1-carboxylic acid (cas: 486-73-7Name: Isoquinoline-1-carboxylic acid).

Isoquinoline-1-carboxylic acid (cas: 486-73-7) belongs to isoquinoline derivatives. Being an analog of pyridine, isoquinoline is a weak base, with a pKa of 5.14. The Pomeranz–Fritsch reaction provides a method for the preparation of isoquinoline. This reaction uses a benzaldehyde and aminoacetoaldehyde diethyl acetal, which in an acid medium react to form isoquinoline.Name: Isoquinoline-1-carboxylic acid

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem