2.3.5.6.7.8- Hexahydro-l,2,4-benzotriazine

Treatment of l-morpholino-6-iminocyclohexene with hydrazine hydrate in the presence of ketones leads to 2,3,5,6,7,8-hexahydro-l,2,4-benzotriazine 4-oxides 156. In the absence of carbonyl compounds, this reaction affords the spirobicyclo compound 157 (75S794). 

Hexahydro-l,2,4-benzotriazine 4-oxides from oximinoenamines and ketones... 

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