Metal free fluoroamination of allylsilanes: A route to 3-fluoropyrrolidines
作者:Lorraine E. Combettes、Oscar Lozano、Véronique Gouverneur
DOI:10.1016/j.jfluchem.2012.05.013
日期:2012.11
The intramolecular fluoroamination of homoallylic amines activated by a triisopropylsilyl or p-tolyldiisopropylsilyl group was successfully performed in the presence of Selectfluor(R) in acetonitrile leading to anti or syn 3-fluoropyrrolidines. The stereochemical outcome of these fluorocyclizations is dictated by the geometry of the alkene precursor. In comparison with oxygen nucleophile, the use of N-tosyl or N-Boc nucleophiles benefits from superior control over stereoselectivity but suffers from competitive fluorodesilylation. (C) 2012 Elsevier B.V. All rights reserved.