Novel 2-ureido-4-ferrocenylpyrimidines have been synthesized from iodoferrocene by a three-step reaction sequence. XRD analysis and spectroscopic data support the presence of an intramolecular hydrogen, bond between a nitrogen, atom of the pyrimidine ring and an NH group of the urea moiety. Both theoretical calculations and NMR investigations prove the existence of two isomeric forms in solution, both of which can form hydrogen bonds with an appropriate guest via an acceptor donor acceptor bonding pattern. Complexation with 2,6-diaminopyridine can be proved either by NMR spectroscopy or by electrochemical measurements.
开发了一种新的合成3-取代的1-二茂铁基-2-丙炔-1-酮的方法,该方法涉及碘代二茂铁与末端乙炔的羰基化Sonogashira偶联。通过炔烃分别与肼和胍盐的加成-环缩合反应得到新的二茂铁基1,3,5-三取代的吡唑和2,4,6-三取代的嘧啶。获得的产物具有中等至极好的收率,并通过各种光谱方法进行了表征(1 H NMR,13 C NMR IR,MS)。