Abstract
In the present work, triethanolammonium 3-hydroxypropane-1-sulfonate [TEA][HPS] as a novel multi-OH functionalized ionic liquid was synthesized. [TEA][HPS] was characterized by 1HNMR, 13CNMR, FT-IR and elemental analysis. In addition to structural study, some physical properties (such as TGA, solubility, conductivity, pH, density and viscosity) of new ionic liquid were determined. The performance of [TEA][HPS] ionic liquid as catalyst and solvent was investigated for the one-pot synthesis of 4H-pyrans through three-component reaction of aldehyde, malononitrile and alkyl acetoacetate at room temperature. [TEA][HPS] ionic liquid could be easily recycled and reused six times without any appreciable decrease in activity. In this research, six of the 4H-pyran derivatives were produced for the first time and also spectra data of all products was reported. Moreover, the biodegradability potential of the [TEA][HPS] ionic liquid was studied using BOD5 parameter [the difference between initial and final dissolved oxygen (DO) after the incubation of five-day]. The obtained results were specified that biodegradability of new ionic liquid is acceptable.
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