Berger KE, McCormick GM, Jaye JA, Rozeske CM, Fort EH. Synthesis of Acridines through Alkyne Addition to Diarylamines.
Molecules 2018;
23:molecules23112867. [PMID:
30400283 PMCID:
PMC6278640 DOI:
10.3390/molecules23112867]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 10/30/2018] [Accepted: 10/31/2018] [Indexed: 11/16/2022] Open
Abstract
A new synthesis of substituted acridines is achieved by palladium-catalyzed addition of terminal acetylenes between the aryl rings of bis(2-bromophenyl)amine. By including a diamine base and elevating the temperature, the reaction pathway favors the formation of acridine over a double Sonogashira reaction to form bis(tolan)amine. This method is demonstrated with several aryl-alkynes and alkyl-alkynes.
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