107896-08-2Relevant academic research and scientific papers
Reaction behaviour of several carbodiimides with 1,1′- ferrocenedicarboxylic acid
Schetter, Bernd
, p. 1074 - 1078 (2004)
1,1′-bis-(1,3-dicyclohexylureidocarbonyl)-ferrocene (1), 1,1′-bis-(1,3-diisopropylureidocarbonyl)-ferrocene (2) and ferrocene-1,1′-bis-N-p-tolylcarboxamide (6) were synthesized by melting down 1,1′-ferrocenedicarboxylic acid (7) together with N,N′-dicyclohexylcarbodiimide (DCC), N,N′-diisopropylcarbodiimide (DIC) or N,N′-di-p-tolylcarbodiimide (8), respectively, without application of any solvent in a short space of time. Substance 1, 2, 1,1′-bis-(1-ethyl-3-tert-butylureidocarbonyl)-ferrocene (3), 1-(1-tert-butyl-3-ethylureidocarbonyl)-1′-(1-ethyl-3-tert- butylureidocarbonyl)-ferrocene (4) and 1,1′-bis-(1-tert-butyl-3- ethylureidocarbonyl)-ferrocene (5) were obtained in good yield by reacting 7 DCC, DIC, or N-tert-butyl-N′-ethylcarbodiimide (9), respectively, with in ethyl acetate for weeks. Transannular 1,1′-ferrocenedicarboxylic anhydride was not detectable or isolable in these reactions. All new compounds were characterized by 1H-NMR, 13C-NMR, IR, MS and elementar analysis. In the case of 1 a single crystal structure analysis was made.
