ChemInform Abstract: THE MEISENHEIMER REARRANGEMENT IN HETEROCYCLIC SYNTHESIS. PART 2. SYNTHESIS AND X‐RAY CRYSTAL STRUCTURE OF A TETRAHYDRO‐1H‐2,3‐BENZOXAZOCINE AND PREPARATION OF A HEXAHYDRO‐2,3‐BENZOXAZONINE
Abstract:Cyclisierung der Amide (I) (Darstellung von (Ib) ist beschrieben), Methoiodierung der Produkte (II) [ ‐+ (III)] und nachfolgende Reduktion liefern die Heterocyclen (IVa) und (IVb), deren N‐Oxide (IVc), (IVd) sich spontan (IVd) bzw. beim Erhitzen in Acetonitril (IVc) in die Titelverbindungen (Va) (Röntgenstrukturanalyse: P21/n(C2h5 ); Z=4) bzw. (Vb) umlagern.
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