Journal of the Chemical Society. Perkin transactions I p. 473 - 475 (1982)
Update date:2022-08-25
Topics:
Yogo, Motoi
Hirota, Kosaku
Senda,Shigeo
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.
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