2-(3,3-Dimethyl-3,4-dihydro-2H-isoquinolin-1-ylidene)acetonitrile containing an enamine fragment has been acylated using acetyl or benzoyl chlorides to give the corresponding enamino ketones. The acylation using oxalyl chloride gives 5,5-dimethyl-2,3-dioxo-2,3,5,6-tetrahydropyrrolo[2,1-a]-isoquinoline-1-carbonitrile. Reaction of the latter with guanidine carbonate or o-phenylenediamine is accompanied by opening of the pyrrole ring and heterocyclization to give the corresponding 2-amino-4-imidazolone and 2-quinoxalone derivatives. Linear amines were formed in similar reactions with m-toluidine, 1-aminoadamantane, o-aminophenol, and 2-amino-3-hydroxypyridine.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 1046-1051, July, 2013.
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Mikhailovskii, A.G., Surikova, O.V., Chugainov, P.A. et al. Acylation reaction of the 3,3-dimethylisoquinoline series enaminonitrile and properties of 5,5-dimethyl- 2,3-dioxo-2,3,5,6-tetrahydropyrrolo[2,1-a]isoquinoline- 1-carbonitrile. Chem Heterocycl Comp 49, 974–979 (2013). https://doi.org/10.1007/s10593-013-1334-x
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DOI: https://doi.org/10.1007/s10593-013-1334-x
Keywords
- 1-aminoadamantane
- 2-amino-3-hydroxypyridine
- 2-amino-4-imidazolone
- o-aminophenol
- 5,5-dimethyl-2,3-dioxo-2,3,5,6-tetrahydropyrrolo[2,1-a]isoquinoline-1-carbonitrile
- 2-(3,3-dimethyl-3,4-di-hydro-2H-isoquinolin-1-ylidene)acetonitrile
- guanidine carbonate
- o-phenylenediamine
- 2-quinoxalone
- m-toluidine
- enamino ketones
- linear amines
- acylation
- heterocyclization