Scheme 1 from: Al-Mahadeen MM, Jaber AM, Al-Najjar BO (2024) Design, synthesis and biological evaluation of novel 2-hydroxy-1 H-indene-1,3(2 H)-dione derivatives as FGFR1 inhibitors. Pharmacia 71: 1-9. https://doi.org/10.3897/pharmacia.71.e122127

Scheme 1 Synthesis of 2-hydroxy-2-(imidazo[1,5-a]pyridinyl)indene-1,3(2H)-diones.