One-pot regioselective synthesis of 1,4,5-trisubstituted pyrazoles under solvent-free conditions without catalyst
作者:Heshmatollah Alinezhad、Mahmood Tajbakhsh、Mahboobeh Zare
DOI:10.1007/s00706-012-0721-9
日期:2012.6
AbstractA fast, one pot method with excellent yield has been developed for preparation of 1,4,5-trisubstituted pyrazoles. Treatment of β-dicarbonyl compounds with N,N-dimethylformamide dimethylacetal and hydrazine derivatives afforded immediately the desired pyrazoles under solvent-free conditions in the absence of catalyst. Graphical abstract
摘要已经开发了一种快速,一锅法且产率高的方法,用于制备1,4,5-三取代的吡唑。用N,N-二甲基甲酰胺二甲基乙缩醛和肼衍生物处理β-二羰基化合物,在无催化剂的条件下,在无溶剂条件下立即得到所需的吡唑。 图形概要