Four-Component Heterocyclization Reaction for the One-Pot Synthesis of 2,4-Dichloro-Substituted Pyrano/Furo[2,3-D]Pyrimidines in an Environmentally Benign Procedure Mediated by Ceric Ammonium Nitrate in Phosphorus Ionic Liquid Publisher



Bahrami G^{1, 2} ; Batooie N^{1, 2} ; Mousavi SR³ ; Miraghaee SS¹ ; Hosseinzadeh N⁴ ; Hoshyari A³ ; Mousavian S³ ; Sajadimajd S⁵ ; Mohammadi B¹ ; Hatami R¹ ; Mahdavi M⁶ Show Affiliations
Source: Polycyclic Aromatic Compounds Published:2023

Abstract

An unprecedented and efficient methodology for the synthesis of 2,4-dichloro-substituted pyrano[2,3-d]pyrimidines and 2,4-dichloro-substituted furo[2,3-d]-pyrimidines is conducted through the one-pot heterocyclization and four-component condensation of acetophenone derivatives, various aromatic aldehydes/potassium iodide, malononitrile, and carbon tetrachloride. The cerium(IV) ammonium nitrate (CAN) was used as a single electron oxidant and ionic liquid (HTPB) as a green promoter under mild conditions at ambient temperature for synthesizing pyrimidine derivatives in high yields. A possible radical mechanism is proposed for these transformations. CAN is found to play an essential role in each step of the reaction. The major advantages of this methodology are experimentally simplicity, environmentally benign, nontoxic, and inexpensive catalyst, excellent yields, and short reaction times. © 2022 Taylor & Francis Group, LLC.