Copper(II)Chloride-Mediated Cyclization Reaction of<i>N</i>-Alkoxy-<i>ortho</i>-alkynylbenzamides
作者:Manita Jithunsa、Masafumi Ueda、Okiko Miyata
DOI:10.1021/ol1029035
日期:2011.2.4
A regioselective intramolecular cyclization/halogenation reaction of N-alkoxy-o-alkynylbenzamides with CuCl2/NCS was developed. The corresponding 3-(chloromethylene)isobenzofuran-1-ones were exclusively obtained via 5-exo-dig cyclization in moderate to excellent yields within 0.5-1 h. This approach has been successfully used to synthesize a biaryl compound by the Suzuki-Miyaura reaction.