Zur Umsetzung von 2‐Amino‐2‐cyclopenten‐1‐on‐Derivaten mit <i>p</i>‐Benzochinon

Abstract

Reaction of 2‐Amino‐2‐cyclopenten‐1‐one Derivatives and p ‐Benzoquinone α‐Ketoenamines 3a and b react with p ‐benzoquinone ( 2 ) to yield benzoxazepine derivatives 5 and 6 . Intermediate 7a is isolated and transformed to 5b . The course of the reaction is discussed.