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Synthesis, characterization, and transistor response of tetrathia-[7]-helicene precursors and derivatives

โœ Scribed by Choongik Kim; Tobin J. Marks; Antonio Facchetti; Michele Schiavo; Alberto Bossi; Stefano Maiorana; Emanuela Licandro; Francesco Todescato; Stefano Toffanin; Michele Muccini; Claudia Graiff; Antonio Tiripicchio

Book ID
103877329
Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
908 KB
Volume
10
Category
Article
ISSN
1566-1199

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A convenient procedure for the synthesis
A convenient procedure for the synthesis of tetrathia-[7]-helicene and the selective ฮฑ-functionalisation of terminal thiophene ring
โœ Stefano Maiorana; Antonio Papagni; Emanuela Licandro; Rita Annunziata; Piero Par ๐Ÿ“‚ Article ๐Ÿ“… 2003 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 209 KB

This paper describes a convenient preparation of tetrathia-[7]-helicene (TH[7]), the generation of the a-anion on the terminal thiophene ring, and the synthesis of the 2-formyl-tetrathia-[7]-helicene (2-CHO-TH [7]). The key intermediate trans-1,2-dibenzodithiopheneethene, prepared in 97% yield by Mc