Journal of Organic Chemistry p. 667 - 674 (1982)
Update date:2022-08-05
Topics: Cyclizations
Mallory, W. Revill
Morrison, Robert W.
Styles, Virgil L.
6-(1-Methylhydrazino)isocytosine cyclizes with α,γ-diketo esters to give pyrimido<4,5-c>pyridazines and 1H-pyrimido<4,5-c>-1,2-diazepines, the latter being predominant in each case.The pyrimidodiazepines are susceptible to ring-opening/ring-closure rearra
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