1,5-Dipolar Electrocyclizations in React
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Daniel H. Egli; Anthony Linden; Heinz Heimgartner
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Article
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2006
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John Wiley and Sons
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German
⚖ 216 KB
Several reactions of a-thioxo ketones and a-thioxo thioamides with diazo compounds were investigated. Most of them proceeded via a reactive thiocarbonyl ylide, which underwent a [2 + 3] cycloaddition with the a-thioxo ketone to give the Schçnberg products 17 -19 or a 1,5-dipolar electrocyclization t