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The heterocyclodehydration and iodocyclization of readily available 1-mercapto-3-yn-2-ols has been performed in a deep eutectic solvent (DES), that is, ChCl/Gly (1:2 molar ratio; ChCl=choline chloride, Gly=glycerol), as a non-conventional green solvent. The processes, carried out at 50 °C for 8 h in the presence of the PdI2/KI catalytic system or at room temperature for 5 h with 1.2 equiv of I2, led...
The synthesis of 3,4-bis[(methoxycarbonyl)methyl]thiophene and bis-, ter- and pentathiophenes, with alternating 3,4-bis(methoxycarbonyl)methyl-substituted rings, is reported. These new thiophene derivatives are possible precursors for the preparation of new conducting polymers useful as materials for electronics.
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