Efficient one-pot synthesis of 3-(polyfluoroalkyl)pyrazol-4-amines
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