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A new multicomponent method for the synthesis of  N -alkyl-2-( Z -1,2-diferrocenylvinyl)-4,5-dihydrooxazolinium salts  3a–f , 5-( N -alkyl-2′,3′-diferrocenyl-acryloylamido)-3-aza-3-alkylpentanols  4a–d , ( E )- N -alkyl- N -(2-morpholinoethyl)-2,3-diferrocenylacrylamides  9a,b,e,f  and ( E )- N -alkyl- N -(2-piperidinoethyl)-2,3-diferrocenylacrylamides  10a,c  from reactions of 2,3-diferrocenylcyclopropenone  1  with  bis -1,4- N,O -nucleophiles in the presence of triethyloxonium tetrafluoroborate, alkyl iodides, morpholine, piperidine and Et 3 N is described. The characterization of the new compounds was done by IR,  1 H- and  13 C-NMR spectroscopy, mass-spectrometry, elemental analysis and X-ray diffraction studies.

N-alkyl-2-(1,2-diferrocenylvinyl)-4,5-dihydrooxazolinium salts, multi-component synthesis and breaking of their heterocyclic systems