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• 107389-30-0 5,6-Dihydro-6-hydroxy-6-methyl-3,4-diphenyl-4H-1,2-oxazin-5-carbonsaeure-ethylester 
• 99996-38-0 1-aci-Nitro-1.2-diphenyl-pentanon-⁽⁴⁾-carbonsaeure-⁽³⁾-aethylester 

Relevant academic research and scientific papers

Heterocyclen aus α-Nitroolefinen. XI. 1,2-Oxazine aus α-Nitroolefinen und β-Dicarbonylverbindungen

Dihydro-1,2-oxazines 8 and 1,2-oxazines 12 are formed by the reaction of the nitronic acids of the adducts of α-nitroolefins and β-dicarbonyl compounds (6) by two ways: A) The nitronic acids 6 are heated in a boiling solution of urea in ethanol or methanol.B) The nitronic acids 6 are reduced with an aqueous solution of ammoniumchloride and sodium sulfide. 1 H-nmr and 13 C-nmr investigations prove the constitutions.The mechanism is discussed.