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].

引用

页码：545 / 553

页数：8