Reactions of Azines. 8. Rearrangement of 1-Oxo-3,4,8-triaza-2,4,6,7-octatetraenes to 2,3-Dihydro-1H-imidazopyrazol-2-ones and 4,9-Dihydropyrazoloquinazolines

DOI: 10.1021/jo00185a026

Source and publish data:

Journal of Organic Chemistry p. 1964 - 1969 (1984)

Update date:2022-07-29

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Authors:

Schweizer, Edward E.

Lee, Kee-Jung

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Article abstract of DOI:10.1021/jo00185a026

Reactions of phosphoranes 1 with isocyanates 2 have given excellent yields of 4,9-dihydropyrazolo<5,1-b>quinazolines 10 and 2,3-dihydro-1H-imidazo<1,2-b>pyrazol-2-ones 13 presumably via the intermediate 1-oxo-3,4,8-triaza-2,4,6,7-octatetraenes 3.The ratio

Full text of DOI:10.1021/jo00185a026

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