Syntheses and ring-opening reactions of 5-alkoxy- and 5-acetoxy-3-oxo-2-azabicyclo[2.2.0]hex-5-enes

Abstract
The efficient photochemical synthesis of 5-alkoxy- and 5-acetoxy-3-oxo-2-azabicyclo[2.2.0]hex-5-enes (2a–e and f,g), and a new rearrangement reaction of the former compounds (2a–e) to 6-alkoxy-2-pyridones (3a–e), are reported.

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