Abstract
The reaction of propanedioic acid, 2-diazo-1,3-bis(1,1-dimethylethyl) ester (di-tert-butyl diazomalonate) with a series of cyclopenta[b]thiophenes in the presence of catalytic rhodium acetate was studied. The resulting S—C ylides underwent a rearrangement to form a heterocycle with different topology; thialene, in very low yields. Experimental and spectral data for all compounds are provided.
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Dedicated to Professor Štefan Toma on the occasion of his 75th birthday
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Machara, A., Svoboda, J. Thiophenium-ylides: Synthesis and reactivity. Chem. Pap. 67, 59–65 (2013). https://doi.org/10.2478/s11696-012-0222-7
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DOI: https://doi.org/10.2478/s11696-012-0222-7