REACTIONS OF 1-ARYL- AND 2,3-DIARYL-5-DIAZO-6,6-DIMETHYL-4-OXO-4,5,6,7-TETRAHYDROINDAZOLES WITH N-ETHYL- AND N-PHENYL-SUBSTITUTED MALEIMIDES

Authors

  • И. Стракова Riga Technical University, Riga LV-1048
  • М. Туркс Riga Technical University, Riga LV-1048
  • Э. Биздена Riga Technical University, Riga LV-1048
  • С. Беляков Latvian Institute of Organic Synthesis, Riga LV-1006
  • А. Токмаков Latvian Institute of Organic Synthesis, Riga LV-1006
  • А. Страков Riga Technical University, Riga LV-1048

DOI:

https://doi.org/10.1007/6720

Keywords:

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

Abstract

[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].

How to Cite
Strakova, I.; Turks, M.; Bizdena, E.; Belyakov, S.; Tokmakov, A.; Strakovs, A.  Chem. Heterocycl. Compd. 2009, 45, 545. [Khim. Geterotsikl. Soedin. 2009, 695.]

For this article in the English edition see DOI 10.1007/s10593-009-0298-3


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Published

2022-04-13

Issue

No. 5 (2009)

Section

Original Papers