作者:Vera I. Filyakova、Nadezhda S. Boltacheva、Pavel A. Slepukhin、Valery N. Charushin
DOI:10.1007/s10593-023-03232-9
日期:2023.8
A simple convenient one-pot protocol for the synthesis of 5-alkyl/hetaryl-4-amino-3-(polyfluoroalkyl)pyrazoles (4-aminopyrazoles) has been suggested. The method is based on using readily available lithium 3-polyfluoroalkyl-1,3-diketonates and sodium nitrite as starting materials and hydrazine hydrate for cyclization into 4-nitroso-3-(polyfluoroalkyl)pyrazoles, followed by reduction of the latter into
提出了一种简单方便的一锅法合成 5-烷基/杂芳基-4-氨基-3-(多氟烷基)吡唑(4-氨基吡唑)。该方法以易得的3-多氟烷基-1,3-二酮锂和亚硝酸钠为起始原料,与水合肼环合生成4-亚硝基-3-(多氟烷基)吡唑,然后将后者还原为目标产物。5-甲基-、5-(噻吩-2-基)-、5-(4-甲基苯基)-和5-(吡啶-2-基)-取代的3-三氟甲基-1 H-吡唑-4的分子结构-胺已通过X射线分析确定。