Lactam Acetals as Potential Enamine Synthons in Heterocyclic Synthesis. 3rd Communication: The Sarcosinanhydride-monolactamacetal System in Cycloaddition Reactions
Sarcosinanhydride-monolactamacetal (7) furnishes an equilibrium concentration of the electronically activated tetrahydropyrazine 3b which yields in contrast to other pyrazine derivatives with 4-nitrophenylazide (4) the cycloaddition product 9.Catalytic cleavage of 9 leads to the triazene compound 11. - Key words: Lactam Acetals, Heterocyclic Synthesis, Cycloaddition Reactions, Triazene
Moehrle, Hans,Dwuletzki, Heinz
p. 229 - 232
(2007/10/02)
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