The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Visible-light synthesis of 4-substituted-chroman-2-ones and 2-substituted-chroman-4-ones via doubly decarboxylative Giese reaction》. Authors are Moczulski, Marek; Kowalska, Ewelina; Kusmierek, Elzbieta; Albrecht, Lukasz; Albrecht, Anna.The article about the compound:Tris(2,2′-bipyridine)ruthenium bis(hexafluorophosphate)cas:60804-74-2,SMILESS:F[P-](F)(F)(F)(F)F.F[P-](F)(F)(F)(F)F.C1(C2=NC=CC=C2)=NC=CC=C1.C3(C4=NC=CC=C4)=NC=CC=C3.C5(C6=NC=CC=C6)=NC=CC=C5.[Ru+2]).Safety of Tris(2,2′-bipyridine)ruthenium bis(hexafluorophosphate). Through the article, more information about this compound (cas:60804-74-2) is conveyed.
Doubly decarboxylative, photoredox synthesis of 4-substituted-chroman-2-ones and 2-substituted-chroman-4-ones was described. The reaction involved two independent decarboxylation processes: the first one initiating the cycle and the second completing the process. Visible light, photoredox catalyst, base, anhydrous solvent and inert atm. constitute the key parameters for the success of the developed transformation. The protocol proved applicable for coumarin-3-carboxylic acids and chromone-3-carboxylic acids as well as N-(acyloxy)phthalimide which served as precursors of the corresponding alkyl radicals.
In some applications, this compound(60804-74-2)Safety of Tris(2,2′-bipyridine)ruthenium bis(hexafluorophosphate) is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.
Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI