Regioselective Synthesis of Oxepin- and Oxocin-Annulated Quinolines by Combined ‘Claisen-Rearrangement/Olefin-Metathesis’ Reactions
作者:Peter Langer、Sven Rotzoll、Helmar Görls
DOI:10.1055/s-2007-990949
日期:2008.1
Oxepin- and oxocin-fused quinolines were prepared by a combined Claisen-rearrangement/ring-closing metathesis approach. The metathesis reactions proceeded in good yields despite the presence of the lone pair of the nitrogen atom of the quinoline moiety. The formation of a hydrochloride salt was not necessary.
An efficient method for visible-light-induced perfluoroalkylaion of quinolin-4-ol has been reported. In the presence of t-BuONa and perfluoroalkyl iodide, quinolin-4-ol underwent CH perfluoroalkylation under the irradiation of green light. Mechanistic studies demonstrated that visible-light promoted intermolecular charge transfer within the transient electron donor-acceptor complex in the absence of