Pyrimidine Derivatives and Related Compounds. Part 42. Isolation of the Intermediates in the Ring Transformation of 1,3-Oxazine-2,4-diones into Pyrimidines and Pyrasoles, and their Structure Determination by 15N Nuclear Magnetic Resonance Analysis

DOI: 10.1039/P19820000473

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Journal of the Chemical Society. Perkin transactions I p. 473 - 475 (1982)

Update date:2022-08-25

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Authors:

Yogo, Motoi

Hirota, Kosaku

Senda,Shigeo

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Article abstract of DOI:10.1039/P19820000473

Reaction of the 6-methyl-1,3-oxazine-2,4-diones (1) and (2) with hydrazine hydrate at room temperature gave the 6-hydroxy-5,6-dihydrouracils (7a) and (8a).The structures of the products were determined by 15N n.m.r. analysis.The mechanism of the ring transformation of 1,3-oxazines into pyrimidines and pyrazoles is discussed.

Full text of DOI:10.1039/P19820000473

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