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The introduction of a thienyl group often enhances the biological activities as well as their electrical conductivities in certain molecules, and thus a large number of compounds have been experimented. Thiopheneboronic acids 1 are useful reagents for the introduction of this thienyl group to a molecule. As shown in the following examples, the Suzuki-Miyaura coupling reactions of 1 with 5-bromouracil derivatives in the presence of palladium catalyst furnished 5-(2-thienyl) uracil derivatives in a 63% and 73% yield, respectively.1a)
References
1)Synthesis of various thienyl compounds
a)S. Gronowitz, A.-B. Honfeldt, V. Kristjansson, T. Musil, Chemica Scripta. 1986, 26, 305.
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