Effect of the solvent nature on the course of quaternization of 3,5-diethoxycarbonyl-2,6-dimethyl-4-(3-pyridyl)-1,4-dihydropyridine
作者:K. Pajuste、M. Gosteva、D. Kaldre、M. Plotniece、B. Cekavicus、A. Sobolev、A. Priksane、G. Tirzitis、G. Duburs、A. Plotniece
DOI:10.1007/s10593-011-0803-3
日期:2011.8
The effect of the solvent nature and temperature on the quaternization of 3,5-diethoxycarbonyl-2,6-dimethyl-4-(3-pyridyl)-1,4-dihydropyridine by lipophilic alkyl bromides has been investigated. By comparison of the solvent effect (acetone, acetonitrile, and 2-butanone) on the alkylation of the pyridine fragment of 3,5-diethoxycarbonyl-2,6-dimethyl-4-(3-pyridyl)-1,4-dihydropyridine it was established that conducting the reaction in acetonitrile at 81 degrees C is the most optimal.