Nitrogen bridgehead compounds. Part 82. An unexpected ring transformation of 6-hydrazono-4-oxo-6,7,8,9-tetrahydro-4H-pyrido [1,2-a]pyrimidine-3-carboxylates

I. Hermecz, Ágnes Horváth, Tünde Erós-Takácsy, Benjamin Podányi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Treatment of 9-hydrazono-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylates with the Vilsmeier-Haack reagent gave unsaturated 7-substituted 9-amino-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylates in a degenerate ring transformation, probably through ring opening via the N(5)C(6) bond.

Original languageEnglish
Pages (from-to)1455-1460
Number of pages6
JournalHeterocycles
Volume32
Issue number8
Publication statusPublished - Aug 1 1991

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Nitrogen Compounds
pyrimidine

ASJC Scopus subject areas

  • Organic Chemistry

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Nitrogen bridgehead compounds. Part 82. An unexpected ring transformation of 6-hydrazono-4-oxo-6,7,8,9-tetrahydro-4H-pyrido [1,2-a]pyrimidine-3-carboxylates. / Hermecz, I.; Horváth, Ágnes; Erós-Takácsy, Tünde; Podányi, Benjamin.

In: Heterocycles, Vol. 32, No. 8, 01.08.1991, p. 1455-1460.

Research output: Contribution to journalArticle

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