Reactions with benzo[b]thiophene-2,3-diones I: Synthesis of 2,3-dihydroxy-2,3-diaryl(aralkyl)benzo[b]thiophene derivatives |
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| Authors: | Mohamed Mohamed Mohamed Sallam Mohamed Helmi Elnagdi Mohamed Husein Abdel-Hady |
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| Abstract: | Benzob]thiophene-2,3-diones ( 1 ) react with Grignard reagents to yield 2,3-dihydroxy-2,3-diaryl(aralkyl)benzob]-thiophenes ( 2 ). The latter compounds yield 3,3-diaryl(aralkyl)-benzob]thiophene-2-ones ( 3 ) by pinacolone rearrangement. Treatment of 3 by hot ethanolic sodium hydroxide solution yields the corresponding carboxylic acids by hydrolytic heteroring opening. |
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