Treatment of 2,4(5)-dialkyl-5(4)-phenylthioimidazoles with Raney nickel produced 2,4(5)-dialkylimidazoles. Methylation of 2,4(5)-dialkyl-5(4)-phenylthioimidazoles yielded 1-methyl-2,4-dialkylimidazoles, whereas methylation of 2,4(5)-dialkylimidazoles yielded in each case two isomers, the 1-methyl-2,4-dialkylimidazole and the 1-methyl-2,5-dialkylimidazole, which were not separated.
M. Masui, H. Miyata, K. Suda and M. Yamauchi, J. Chem. Soc., Perkin Trans. 1, 1972, 1960 DOI: 10.1039/P19720001960
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