Rearrangement of 4-Oxothiochroman-1-io(bismethoxycarbonyl)methanides to Tetrahydro-1-benzothiepin-5-ones

DOI: 10.1039/P19810002978

Source and publish data:

Journal of the Chemical Society. Perkin transactions I p. 2978 - 2981 (1981)

Update date:2022-09-26

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Authors:

Tamura, Yasumitsu

Takebe, Yasushi

Mukai, Chisato

Ikeda, Masazumi

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Article abstract of DOI:10.1039/P19810002978

Heating thiochroman-4-ones with dimethyl diazomalonate without solvent or in refluxing toluene in the presence of copper(II) sulphate gave the corresponding bismethoxycarbonylmethanides (4) and dimethyl 5-oxo-2,3,4,5-tetrahydro-1-benzothiepin-2,2-dicarboxylates (5).Treatment of the sulphonium methanides (4) with triethylamine afforded (5).

Full text of DOI:10.1039/P19810002978

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