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Synthesis of thiophenes from acetylenes and bis-amine disulfides

✍ Scribed by Francisco M. Benitez; John R. Grunwell

Book ID
104235551
Publisher
Elsevier Science
Year
1977
Tongue
French
Weight
190 KB
Volume
18
Category
Article
ISSN
0040-4039

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✦ Synopsis

The reversible formation of thionitroxyl radicals 1 from the thermolysis of his-amine disulfides 2 has been observed by esr spectroscopy1,2. These radicals

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Both symmetrically and unsymmetrically substituted 2,5-bis-(acetylenic) thiophene derivatives were obtained in good yields under mild conditions through palladium-catalyzed cross coupling reaction of 2,5-bis-(butyltelluro) thiophene 2 and terminal alkynes. The methodology represents a general and ef