Ferrocenyl induced one-pot synthesis of 3, 3′-ferrocenylbiindoles. Issue 8 (17th April 2020)

• Record Type: Journal Article
• Authors: Yan, Ligang; Han, Limin; Xie, Ruijun
• Is Part Of: Journal of coordination chemistry. Volume 73:Issue 8(2020)
• Page Start: 1325
• Page End: 1338
• Publication Date: 2020-04-17
• Subjects: Ferrocenyl -- biindoles -- one-pot synthesis -- reaction mechanism -- homo-coupling; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2020.1770235
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: When we used 2-ferrocenethynylaniline (1a ) as reactant and NaAuCl4 ·2H2 O (5%) as catalyst to prepare 2-ferrocenylindole (2a ), we were surprised to find that 3, 3′-ferrocenylbiindole (3a ) was obtained simultaneously. 3a was characterized by elemental analysis, FT-IR, MS, NMR, and X-ray single crystal diffraction. The reactant substitution reaction, in-situ HNMR, XPS, EPR characterization, and calculations were carried out to interpret why 3a was obtained in one pot. The results showed that the hydroperoxyl radical played a key role in the reaction, which induced synthesis of 3a . Graphical Abstract: