Synthesis utilizes fluorenylmethyloxycarbonyl and thionyl chloride to generate 1H-benzo[d][1,3]oxazine-2,4-diones, suggesting an efficient method for organic synthesis.
We report the synthesis of 1 H -benzo[ d ][1,3]oxazine-2,4-diones from 2-aminobenzoic acids, using fluorenylmethyloxycarbonyl (Fmoc), benzyloxycarbonyl (Cbz) and ethyloxycarbonyl (EtOCO) groups as the source of carbonyloxy group, and thionyl chloride.
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Mitsostergios et al. (2025) studied this question.
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