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The Volhard–Erdmann cyclization is an organic synthesis of alkyl and aryl thiophenes by cyclization of disodium succinate or other 1,4-difunctional compounds (γ-oxo acids, 1,4-diketones, chloroacetyl-substituted esters) with phosphorus heptasulfide.The reaction is named after Jacob Volhard and Hugo Erdmann.An example is the synthesis of 3-methylthiophene starting from itaconic acid:Volhard-Erdmann cyclization↑ ↑

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  • The Volhard–Erdmann cyclization is an organic synthesis of alkyl and aryl thiophenes by cyclization of disodium succinate or other 1,4-difunctional compounds (γ-oxo acids, 1,4-diketones, chloroacetyl-substituted esters) with phosphorus heptasulfide.The reaction is named after Jacob Volhard and Hugo Erdmann.An example is the synthesis of 3-methylthiophene starting from itaconic acid:Volhard-Erdmann cyclization↑ ↑
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