Chloroferrates , tetra

A few systems obtained by the ECD method comprise polyacetylene tetra-chloroferrate [87] [CH(FeCl4)y]x and tetrachloroaluminate [CH(A1C14)X], Li+ doping (LiC104 in propylene carbonate) [86] or [(CH)x(SbF6)y] (anodic oxidation in a solution of [CH3(CH2)3]4 N+ SbFg in dry CH2C12) [92]. 

A novel imidazole synthesis utilizes the salt IV-isopropylacetonitrilium tetra-chloroferrate (8) in condensation with an amino acid ester. The salt is readily made from acetonitrile, ferric chloride and isopropyl chloride. For example, with norvaUne methyl ester a 40% yield of 5-hydroxy-l-isopropyl-2-methyl-4-propylimidazole results. The reaction is believed to proceed via an intermediate amidine. Similarly, 1-isopropyl-2,5-dimethylimidazole is formed when (8) reacts with propargylamine (Scheme 4.1.5) [43, 44). 

The reactions of a-aminocarbonyl compounds (and their acetals) with cyanamide continue to provide an attractive route to 2-aminoimidazoles. A 40% yield of the 5-hydroxyimidazole derivative 29 was obtained from the interaction of norvaline methyl ester and JV-isopropylacetonitrilium tetra-chloroferrate (28). ... 

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