Abstract
2-(1-Phthalazinylhydrazino)methylene-(IIIa) or 2-(1-phthalazinylhydrazino)ethylidene-5,5-dimethyl-1,3-cyclohexanediones (IIIb) were prepared from 1-hydrazinophthalazine and 2 formyl- or 2-acetyldimedone. Cyclization of IIIb in the presence ofp- TsOH gave 1-(1-phthalazinyl)3, 6, 6-trimethyl-4-oxo-4, 5, 6, 7-tetrahydroindazole. Reaction of 4-methoxyphenylhydrazine with 2 formyl- and 2-acetyidimedone gave the corresponding 1-(4methoxyphenyl)-4-oxo-4, 5, 6, 7-tetrahydroindazole. In the case of 2 -formyldimedone the intermediate 2-(4methoxyphenylhydrazinomethylene)-5, 5-dimethyl-1,3-cyclohexanedione was isolated.
Similar content being viewed by others
References
I. A. Strakova, A. Ya. Strakov, and M. V. Petrova, Latv. Kim. Zurn, No. 6, 733 (1994).
I. A. Strakova, A. Ya. Strakov, and M. V. Petrova, Khim. Geterotsikl. Soedin., No. 3, 351 (1955).
A. Ya. Strakov, M. V. Petrova, Yu. Popelis, A. A. Krasnova, and 1. A. Strakova, Khim. Geterotsikl. Soedin., No. 2, 247 (1996).
I. A. Strakova, A. Ya. Strakov, M. T. Strautzele, and É. Yu. Gudrinietse, Izv. Akad. Nauk Latv. SSR, Ser. Khim., No. 5, 597 (1968).
A. Ya. Strakov, M. T. Strautzele, and D. Lautsenietse, Izv. Akad. Nauk Latv, SSR, Ser. Khim., No. 6, 704 (1968).
M. T. Shultsa and A. Ya. Strakov, Izv. Akad. Nauk Latv. SSR, Ser. Khim., No. 3, 329 (1971).
Additional information
Riga Technological University, Riga LV-1658. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 708–710, May, 1996. Original article submitted December 31, 1995.
Rights and permissions
About this article
Cite this article
Strakov, A.Y., Strakova, I.A. & Petrova, M.V. 1-(1-Phthalazinyl)- and 1-(4methoxyphenyl)-6,6dimethyl-4oxo-4,5,6,7-tetrahydroindazole. Chem Heterocycl Compd 32, 610–612 (1996). https://doi.org/10.1007/BF01164795
Issue Date:
DOI: https://doi.org/10.1007/BF01164795