Ultrasound assisted synthesis of imidazolium salts: An efficient way to ionic liquids
In this study a straightforward and efficient approach concerning synthesis of 1,3-diazole derivatives under ultrasound (US) irradiation as well as under conventional thermal heating (TH) is presented. N-alkylation under US irradiation may be considered environmentally friendly in terms of higher yields, smaller amounts of solvent used and an overall energy efficiency due to a substantial reduction of reaction times. A comparative study of ultrasound vs. conventional conditions has been performed. Overall, the use of US proved to be more efficient than TH. A possible explanation concerning the different behavior of imidazole and benzimidazole in the N1-alkylation reactions under US irradiation was proposed.
Synthesis and Spectroscopic Properties of N-Azolylpropanamides
Fourteen N-azolylpropanamides have been prepared by Michael addition of azoles on acrylamide.The compounds have been fully characterized by IR and by 1H and 13C-NMR.The isolated componds are the most stable derivatives; kinetic compounds were observed but could not be isolated.
Cruz, Angeles de la,Elguero, Jose,Goya, Pilar,Martinez, Ana
p. 225 - 229
(2007/10/02)
Synthesis in the benzimidazole series. Synthesis of benzimidazole N-β-ethyl carboxylic acid and 2-methyl benzimidazole N-β-ethyl carboxylic acid
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Alam
p. 22 - 24
(2007/10/08)
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