SCHEDULED MAINTENANCE
The original method of preparing thiocoumarin has been improved. Thiocoumarin reacts with phenylmagnesium bromide to give 2-phenyl-4H-thiochromen and thioflavone, and with bromine to yield 3,4-dibromo-3,4-dihydro-thiocoumarin. Treatment of 3-bromocoumarin with alkali gives benzo[b]thiophen-2-carboxylic acid.
W. D. Cotterill, C. J. France, R. Livingstone and J. R. Atkinson, J. Chem. Soc., Perkin Trans. 1, 1972, 817 DOI: 10.1039/P19720000817
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