Cycloaddition of olefinic compounds to 2H-1,4-oxazin-2-ones: Synthesis of 2-oxa-5-azabicyclo[2.2.2]oct-5-en-3-ones

Article abstract of DOI:10.1055/s-1992-26205

The [4 + 2] cycloaddition reactions of 2H-1,4-oxazin-2-ones 5 to olefins and the generation of new 2-oxa-5-azabicyclo[2.2.2]oct5-en-3-ones of type 6 is studied. The cycloaddition is promoted by the 5-Cl substituent in the oxazinone and can be performed wi