Synthesis of pyrazoles with fluorinated side-chain by cyclization of fluoroalkylated triketides

Autor: Marleen Winterberg, Christine Fischer, Peter Langer, Stefan Büttner, Alexander Villinger, Dirk Michalik, Ashot S. Saghyan, Willi Desens
Rok vydání: 2013
Předmět:
Zdroj: Tetrahedron. 69:3459-3464
ISSN: 0040-4020
DOI: 10.1016/j.tet.2013.02.059
Popis: The cyclization of fluoroalkylated 3,5-dioxoesters with hydrazines, carried out in glacial acetic acid, afforded pyrazines with fluoroalkylated side-chain. The cyclization of 3,5-dioxoesters with hydroxylamine afforded hydroxylated fluoroalkylated dihydroisoxazoles. All reactions proceeded with good to very good regioselectivity.
Databáze: OpenAIRE