HNTf<sub>2</sub>-Catalyzed Regioselective Preparation of Polysubstituted Naphthalene Derivatives Through Alkyne–Aldehyde Coupling
作者:Sudipta Ponra、Maxime R. Vitale、Véronique Michelet、Virginie Ratovelomanana-Vidal
DOI:10.1021/acs.joc.5b00353
日期:2015.3.20
We report herein the preparation of polysubstituted naphthalene derivatives by the original Brønsted-acid-catalyzed benzannulation reaction of phenylacetaldehydes with alkynes. This reaction, which was usually performed with Lewis acids under thermal activation, is efficiently promoted by 15 mol % of triflimide (HNTf2) at room temperature under metal-free and mild reaction conditions and leads with