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KMID : 0370219870310010014
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Yakhak Hoeji
1987 Volume.31 No. 1 p.14 ~ p.18
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Synthesis of 2-Substituted-4-hydroxy-2H-1,2-benzothiazine-3-carboxlic acid 1,1-dioxides from 2-Substituted-3,4-dihydro-2H-1,2-benzothiazin-4-one 1,1-dioxides
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서정진/Suh JJ
홍유화/Hong YH
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Abstract
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2-Substituted-3,4-dihydro-2H-1,2-benzothiazin-4-one 1,1-dioxide 6 was reatced with magnesium methyl carbonate to form magnesium chelate 7, which could be hydrolized in cold hydrochloric acid solution to give 2-substituted-4-hydroxy-2H-1,2-benzothiazine-3-carboxylic acid 1,1-dioxide 2 in good yield.
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