Reactions of 1-aryl- and 2,3-diaryl- 5-diazo-6,6-dimethyl-4-oxo-4,5,6,7-tetra- hydroindazoles with N-ethyl- and N-phenyl-substituted maleimides

被引：0
|
作者：
I. Strakova
M. Turks
E. Bizdena
S. Belyakov
A. Tokmakov
A. Strakovs
机构：
[1] Riga Technical University,
[2] Latvian Institute of Organic Synthesis,undefined
来源：
Chemistry of Heterocyclic Compounds | 2009年 / 45卷
关键词：
1,3- and 2,3-substituted 5-diazo-6,6-dimethyl-4-oxo-4,5,6,7-tetrahydroindazoles; N-ethyl- and N-phenylmaleimides; [3+2] cycloaddition reactions;
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摘要：
[3+2] Cyclocondensation reactions of a series of 1,3- and 2,3-disubstituted 5-diazo-6,6-dimethyl-4-oxo-4,5,6,7-tetrahydroindazoles with N-ethyl- and N-phenyl-substituted maleimides have been used to obtain the corresponding 6,6-dimethyl-4,4',6'-trioxo-4,5,6,7-3',3'a,4',5',6',6'a-decahydrospiro-[indazole-5,3'-pyrrolo[3,4-c]pyrazoles]. On boiling these compounds in toluene nitrogen is split off and they are converted into 6',6'-dimethyl-2,4,4'-trioxo-4',5',6',7'-tetrahydro-1'H-spiro[3-azabicyclo-(3.1.0)hexane-6,5'-indazoles].
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页码：545 / 553
页数：8
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