α-Sulfanyl and α-Selanyl Propadienyl Cations: Regioselective Generations and Cycloadditions with Thioamides and Selemides Controlled by MeNO<sub>2</sub>−H<sub>2</sub>O System
作者:Mitsuhiro Yoshimatsu、Teruhisa Yamamoto、Arisa Sawa、Tomohiro Kato、Genzoh Tanabe、Osamu Muraoka
DOI:10.1021/ol9011844
日期:2009.7.2
α-Sulfanyl and α-selanyl propadienyl cations were easily generated by the catalytic system, scandium triflate-nitromethane-H2O in the presence of Bu4NHSO4, to regioselectively afford the multifunctionalized thiazoles and selenazoles in high yields.
在Bu 4 NHSO 4的存在下,催化体系三氟甲磺酸-硝基甲烷-H 2 O易于生成α-硫烷基和α-硒代丙二烯基阳离子,从而以高收率选择性地提供了多官能化的噻唑和亚硒唑。