Platinum-catalyzed reactions of 2,3-bis(diethylsilyl)thiophene with alkynes
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Add time:07/20/2019 Source:sciencedirect.com
The reactions of 2,3-bis(diethylsilyl)thiophene 1 with alkynes such as diphenylacetylene, 3-hexyne and phenylacetylene in the presence of a catalytic amount of Pt(PPh3)4 in benzene at 80 °C proceeded to give products 2, 3, and 6a,b, respectively. Treatment of a mixture consisting of 1 and 1,4-diethynylbenzene with a Pt(PPh3)4 catalyst in refluxing benzene produced three types of isomers consisting of two di(silyl)thiophene units and a diethynylbenzene unit. Computational analyses for the reaction mechanism of the platinum-catalyzed reaction have also been reported.
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