Advances in Heterocyclic Chemistry, Volume 147 in this ongoing series, highlights new advances in the field, with this new volume presenting interesting chapters written by an international board of authors. New chapters in this release include Synthesis and chemistry of pyridazin-3(2H)-ones, Denitrogenative Transformations of Polynitrogen Heterocycles, Pyridinium-phenolate Dyes: Preparation and Properties, Recent Advances in the Mechanochemical Synthesis and Derivatization of Heterocycles, Recent Advances in the Synthesis of 7- and 8- Membered Heterocycles via Domino and Multicomponent Reactions (from 20?-2024), and Total Synthesis of Natural Products with Isoflavone Skeletons and Other Heterocycles.