The first one‐pot synthesis of pyridazinones and phthalazinones from arenes, cyclic anhydrides, and ArNHNH2 in the presence of efficient recyclable heterogeneous catalyst, HY‐zeolite, in high yield and short reaction time is reported. J. Heterocyclic Chem., (2011).
A simple and efficient procedure for the synthesis of pyridazin-3(2H)-ones through copper-catalyzeddehydrogenation of a single C–C bond of 4,5-dihydropyridazin-3(2H)-ones to a C=C bond with oxygen as the terminal oxidant is described. Functional groups including hydroxy, carboxylic, bromo, chloro, cyano, nitro and alkoxy were all tolerated under the reaction conditions. Moreover, this methodology
The first three-component and regioselective synthesis of pyridazinones and phthalazinones from arenes, anhydrides and ArNHNH2 in the presence of efficient recyclable heterogeneous catalyst, montmorillonite-KSF, in high yield and short reaction time is reported.
One-pot synthesis of 2,6-diaryl-4,5-dihydropyridazin-3(2H)-ones: Copper catalyzed annulation of aldehydes, arylhydrazines and 3-acryloyloxazolidin-2-one
作者:Jianbo Zhao、Shengshu Lei、Min Wu、Can Pang、Hao Li
DOI:10.1016/j.tetlet.2023.154473
日期:2023.5
The three-component synthesis of pyridazinones from aldehydes, arylhydrazines and 3-acryloyloxazolidin-2-one catalyzed by Cu(OTf)2 has been developed. This strategy exhibits high tolerance towards many functional groups including various aliphatic, aromatic and hetero-aromatic aldehydes to give 2,6-diaryl-4,5-dihydropyridazin-3(2H)-one products in moderate to high yields.
开发了Cu(OTf) 2催化醛类、芳基肼类和3-丙烯酰恶唑烷-2-酮类三组分合成哒嗪酮类化合物。该策略对包括各种脂肪族、芳香族和杂芳族醛在内的许多官能团表现出高耐受性,以中高产率生成 2,6-diaryl-4,5-dihydropyridazin-3(2 H )-one 产物。