Modified method for the synthesis of isomeric N-substituted (1H-pyrazolyl)propane-1,3-diones
作者:I. V. Taydakov、S. S. Krasnoselsky
DOI:10.1007/s10593-011-0821-1
日期:2011.9
The condensation reaction of isomeric N-substituted (1H-pyrazol-4-yl)ethanones with the ethyl esters of pyrazole carboxylic acids and fluoroacetic acids has been studied using NaH as the base. Under optimized conditions, it proved to be a convenient and preparative method for the synthesis of N-substituted (1H-pyrazolyl)propane-1,3-diones and (1H-pyrazolyl)-4-polyfluorobutane-1,3-diones.
以NaH为碱,研究了异构的N-取代的(1 H-吡唑-4-基)乙酮与吡唑羧酸和氟乙酸乙酯的缩合反应。在优化的条件下,它被证明是合成N-取代的(1 H-吡唑基)丙烷-1,3-二酮和(1 H-吡唑基)-4-多氟丁烷-1,3-二酮的简便方法。