Selective ring closure to substituted pyrido[1,2-b]-as-triazinium salt

DOI: 10.1016/S0040-4020(01)86594-7

Source and publish data:

Tetrahedron p. 8459 - 8464 (1992)

Update date:2022-08-03

Topics:

Authors:

Hajos Hajos

Riedl Riedl

Gacs-Baitz

Messmer Messmer

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Article abstract of DOI:10.1016/S0040-4020(01)86594-7

Reaction of arylglyoxal with 1,2-diaminopyridinium salt 1 under acidic conditions afforded 2-aryl-pyrido[1,2-b]-as-triazinium salt 9 selectively, whereas cyclization of the same dioxo compound with 1-amino-2-iminopyridine 5 under neutral conditions - due

Full text of DOI:10.1016/S0040-4020(01)86594-7

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Product name:2,5-dihydro-2-hydroxy-3-(4'-chlorophenyl)-pyrido<1,2-b>-as-triazin

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