Multi-component synthesis of methylene bis isoxazolo[4,5-b]-pyridine-N- oxides
A three component one-pot protocol was investigated for the synthesis of methylene bis isoxazolo[4,5-b]-pyridine-N-oxides from commercially available materials.
Rajanarendar,Nagi Reddy,Rama Murthy
experimental part
p. 927 - 930
(2011/11/12)
Multicomponent synthesis of spiroisoxazolines
A three-component one-pot procedure (3-MCR) was developed to assemble the spiroisoxazoline nucleus from commercially available materials. This new methodology affords the title compounds in high yields and without the use of chromatography.
Adamo, Mauro F. A.,Donati, Donato,Duffy, Eleanor F.,Sarti-Fantoni, Piero
p. 8395 - 8399
(2007/10/03)
Chemistry of Heterocylces: Part VIII - Synthesis of Isoxazolylethylpyrazoles
The base-catalysed addition of acetylacetone to 3-methyl-4-nitro-5-styrylisoxazoles (II) leads to the Michael adducts 3-pentane-2,4-diones (III).These β-diketones (III) undergo cyclization with hydrazine sulphate and phenylhydrazine to furnish pyrazoles (IV) and N-phenylpyrazoles (V), respectively.
Reddi, K. Malla,Rao, C. Janakirama,Murthy, A. Krishna
p. 212 - 213
(2007/10/02)
Ethylene-diheterocycles: Part I - Synthesis of 5--3-methyl-4-nitroisoxazoles
Michael addition of acetylacetone to 3-methyl-4-nitro-5-styrylisoxazoles (I) in triethylamine leads to 3--2,4-pentanediones (II).The pentanediones (II) undergo cyclisation with hydroxylamine to give 5-ω
Rao, C. Janakirama,Reddy, K. Malla,Murthy, A. Krishna
p. 997 - 998
(2007/10/02)
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