Diels‐Alder‐Reaktionen von 2,4‐Bis{[(tert‐butyl)dimethylsilyl]oxy}‐3‐aza‐1,3‐pentadien mit Heterodienophilen

Abstract

Diels-Alder Reactions of 2,4-Bis{ [(tert-butyl)dimethylsilyl~oxy}-3-aza-l,3-pentadien with HeterodienophilesThe 2,4-bis{ [(tert-butyl)dimethylsilyl]oxy~-3-aza-l,3-pentadien (2) reacts via the Diels-Alder adducts 3, 6a<, and 8a, b,which cannot be isolated, giving the triazines 4, 7a-c, and the oxadiazines 9a, b. The hydrolysis of 4 in MeOH affords the N-acetyl-acetamid derivative 5. The formula of 9a is proven by an X-ray-structure analysis.Einleitung. -