Treatment of N-(2-hydroxy-3,5-dimethylbenzyl)-β-aminopropanoic acid with dehydrating agents gives 3,4-dihydro-3-(2-hydroxy-3,6-dimethylbenzyl)-6,8-dimethyl-2H-1,3 benzoxazine; a reaction pathway is proposed, involving loss of keten.
M. C. Aversa, P. Giannetto, C. Caristi and A. Ferlazzo, J. Chem. Soc., Chem. Commun., 1982, 469 DOI: 10.1039/C39820000469
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