The present disclosure generally relates to ionic compositions which may be used in or as an adhesive material for selectively adhering two items together. More particularly, but not exclusively, the present disclosure relates to ionic compositions that include a cationic imidazolium compound and an anionic compound such as a sulfonyl imide compound.
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Page/Page column 19
(2018/09/21)
4,5-Dimethylimidazole: A Correction and Alternative Synthesis
Fractional vacuum distillation of the product obtained from thermal condensation of acetoin with formamide is a formic acid complex of 4,5-dimethylimidazole, and not the expected free base.The 1H and 13C nmr spectra suggest that the product may be closer to a 1:1 hydrogen-bonded adduct than a true salt.Commercial 4-hydroxymethyl-5-methylimidazole is converted quantitatively to the 4-chloromethyl derivative with thionyl chloride; hydrogenolysis of the latter compound provides 4,5-dimethylimidazole in an overall 80-90 percent yield, doubling the yield obtained by the classical method.
D'Sa, Albinus,Cohen, Louis A.
p. 1819 - 1820
(2007/10/02)
Preparation of imidazoles
Disclosed is a novel process and product involving the manufacture in advantageously high yields of imidazole compounds corresponding to the general formula: STR1 wherein a preferred embodiment of the process comprises contacting a diamine salt of the formula STR2 with a biscarbonyl compound of the structure STR3 in an acid medium, wherein R, R1 and R2 each represents hydrogen or any group which does not hinder the cyclization reaction or lead to degradation of the reactants or imidazole products, and A- is an anion equivalent such as that of mineral acids, sulfonic acids and carboxylic acids.
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(2008/06/13)
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