An Efficient Synthesis of Isoxazoles and Pyrazoles under Ultrasound Irradiation
作者:Zhi-Bin Huang、Li-Li Li、Yan-Wei Zhao、Hui-Yuan Wang、Da-Qing Shi
DOI:10.1002/jhet.2016
日期:2014.8
series of 5-arylisoxazole and 5-aryl-1H-pyrazole derivatives was synthesized by the reaction of 3-(dimethylamino)-1-arylprop-2-en-1-one with hydroxylamine hydrochloride or hydrazine hydrate underultrasoundirradiation without using any catalyst. This method has the advantages of easier work-up, mild reaction condition, high yields, shorter reaction time, and environmentally benign procedure.
New isoxazole derivatives designed as nicotinic acetylcholine receptor ligand candidates
作者:N Silva
DOI:10.1016/s0223-5234(01)01327-7
日期:2002.2
In this work we report the synthesis and evaluation of the analgesic properties of new isosteric heterocyclic derivatives, presenting the isoxazole nucleus, designed as nicotinic acetylcholine receptor ligand candidates, analogues to alkaloid epibatidine. Compound 2-(3-methyl-5-isoxazolyl)pyridine (3) presented the best analgesic profile of this series in hot plate test, which was partially prevented by pretreatment with nicotinic receptor antagonist mecamylamine. (C) 2002 Published by Editions scientifiques et medicales Elsevier SAS.
Monohydrochloride Assisted Synthesis of Functionalized Isoxazoles and Pyrazoles from Allenic Ketones: First Synthesis of (<i>Z</i>
)-2-Methyl-7H-benzo[b]pyrazolo[5,1-d][1,5]oxazocines
作者:Debayan Sarkar、Sushree Ranjan Sahoo
DOI:10.1002/ejoc.201900008
日期:2019.3.14
A straight forward synthesis of substituted isoxazoles and pyrazoles from 1,2‐allenic ketones assisted by hydrochlorides of hydrazine and hydroxylamine is presented. In the process, the propyloxy‐phenyl pyrazoles were transformed to (Z)‐2‐methyl 7H benzo[b]pyrazolo[5,1‐d][1,5]oxazocines which are important and emissive compounds.