Silyl-Substituted Tetrathia[7]helicenes: Synthesis, X-ray Characterization and Reactivity

Autor:	Antonio Tiripicchio, Alberto Bossi, Emanuela Licandro, Stefano Maiorana, Claudia Graiff
Rok vydání:	2007
Předmět:	chemistry.chemical_classification Silylation Stereochemistry Alkene Organic Chemistry Dihedral angle Medicinal chemistry Turn (biochemistry) chemistry.chemical_compound Electrophilic substitution chemistry Helicene Thiophene Reactivity (chemistry) Physical and Theoretical Chemistry
Zdroj:	European Journal of Organic Chemistry. 2007:4499-4509
ISSN:	1099-0690 1434-193X
Popis:	We describe the synthesis of trialkylsilyl-substituted trans-1,2-bis(thieno[3,2-e]benzothiophene-2-yl)ethenes as suitable soluble precursors for the preparation of the corresponding silylated tetrathia[7]helicenes, which, in turn, can be desilylated or transformed into dihalogen-substituted derivatives through electrophilic substitution of silyl substituents. X-ray structural studies showed that the presence of the two triisopropylsilyl groups on the terminal thiophene rings accounts for the high solubility of the alkene and for the very large dihedral angle in the helicene. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::65bfea7018a8edd28a32865f4a02f736 https://doi.org/10.1002/ejoc.200700494 Zobrazit plný text záznamu Plný text