4211-87-4Relevant academic research and scientific papers
Monohydrochloride Assisted Synthesis of Functionalized Isoxazoles and Pyrazoles from Allenic Ketones: First Synthesis of (Z)-2-Methyl-7H-benzo[b]pyrazolo[5,1-d][1,5]oxazocines
Sarkar, Debayan,Sahoo, Sushree Ranjan
, p. 2035 - 2049 (2019/03/07)
A facile hydrochloride promoted regioselective synthesis of isoxazoles and pyrazoles from 1,2-allenic ketones is reported. The reaction has been scaled up to gram scale. A direct 8-endo dig ring annulations towards the first synthesis of (Z)-2-methyl-7H-b
An efficient synthesis of isoxazoles and pyrazoles under ultrasound irradiation
Huang, Zhi-Bin,Li, Li-Li,Zhao, Yan-Wei,Wang, Hui-Yuan,Shi, Da-Qing
, p. E309-E313 (2014/11/07)
A 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 under ultrasound irradiation without using any catalyst. This m
Clean and efficient synthesis of isoxazole derivatives in aqueous media
Dou, Guolan,Xu, Pan,Li, Qiang,Xi, Yukun,Huang, Zhibin,Shi, Daqing
, p. 13645 - 13653 (2014/01/06)
A series of 5-arylisoxazole derivatives were synthesized via the reaction of 3-(dimethyl-amino)-1-arylprop-2-en-1-ones with hydroxylamine hydrochloride in aqueous media without using any catalyst. This method has the advantages of easier work-up, mild rea
Synthesis of 3-Substituted 5-Arylisoxazoles from α,β-Unsaturated Oximes
Alberola, Angel,Banez, J. Manuel,Calvo, Luis,Rodriguez, M. Teresa Rodriguez,Sanudo, M. Carmen
, p. 467 - 471 (2007/10/02)
The synthesis of 3-substituted 5-arylisoxazoles from oximes of α,β-unsaturated ketones is studied. The formation of the isoxazole derivatives takes place by cyclization of oximes in the presence of iodine and potassium iodide. The presence of isoxazoline
RING TRANSFORMATION REACTION OF 1,4,6-TRISUBSTITUTED 2(1H)-PYRIMIDINONES AND -THIONES WITH HYDROXYLAMINE
Kashima, Choji,Katoh, Akira,Yokota, Yuko,Omote, Yoshimori
, p. 2516 - 2519 (2007/10/02)
1,4,6-Trisubstituted 2(1H)-pyrimidinones (Ia-e) underwent ring transformation with hydroxylamine to afford 3,5-disubstituted isoxazoles (IIa-e) in high yields.On the other hand, 2(1H)-pyrimidinethiones (IIIa, b, f-k) underwent ring transformation to give mainly a new type of N-substituted 2-aminopyrimidine 1-oxides (IVa, b, f-k) as well as isoxazoles.The reaction of pyrimidinium salts (VII, VIII, and IX) with hydroxylamine is also discussed.Keywords: - ring tranformation reaction; hydroxylamine; nucleophilic reaction; 3,5-disubstituted isoxazoles; N-substituted 2-aminopyrimidine 1-oxides; pyrimidinium salts
