Decarboxylation and fragmentation of 5,6-dihydro-4H-1,2-oxazine-3-carboxylic acids
Abstract
The title compounds, which are derived from the cycloaddition of α-nitroso-acrylic esters or of α-nitrosoacrolein to olefins, are thermally decarboxylated to give γ-hydroxynitriles in a stereoselective process.