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- W2089811425 abstract "Nous décrivons dans ce travail. deux synthèses de l'acide benzisoxazole-1,2 acétique-3 marqué respectivement au carbone 14 en positions α et ß. L'acide 14C-α est obtenu à partir d'hydroxy-4 coumarine (14C-3) synthétisée à partir d'hydroxy-1 acétophénone (14C-CH3) obtenue par réaction de Fries. L'acide 14C-ß est synthétisé à partir d'hydroxy-4 coumarine 14C-2 obtenue à partir de carbonate d'éthyle 14C. Les positions de marquage ont été contrǒlées par spectrométrie de masse et ont confirmé le schéma réactionnel supposé du réarrangement en acide benzisoxazole-1,2 acétique-3. The preparations of 1,2-benzisoxazole-3-acetic acid labelled with 14C in position α or β of the side chain are described. α-14C acid was obtained from 4-hydroxy coumarin [3-14C] via Fries rearrangement of phenyl acetate [methyl-14C]. β -14C acid was synthesized from 4-hydroxy coumarin [2-14C] obtained from 14C-diethyl carbonate. Labelled positions were determined by mass spectrometry and were in agreement with the proposed reaction scheme." @default.
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- W2089811425 date "1988-11-01" @default.
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- W2089811425 title "Synthese d'Acide Benzisoxazole-1, 2 Acetique-3 (14C-α) et (14c-β)" @default.
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- W2089811425 doi "https://doi.org/10.1002/jlcr.2580251110" @default.
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