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This work presents a three-step synthesis of a new series of 4-substituted 2-oxo-6-trihalomethyl-[1,3]oxazinane-3-carboxylic acid ethyl esters, from β-alkoxyvinyl trihalomethyl ketones of general formula X 3 C–C(O)–CHC(R)–OR 1 , where R=H, Me, Ph, and 4-Me-Ph; R 1 =Me and Et; and X=F and Cl. The Michael addition–substitution of the ethyl carbamate on β-alkoxyvinyl trihalomethyl...
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