1.1: t-BuLi / diethyl ether; pentane / 2 h / -78 °C 1.2: lithium 2-thienyl-cyanocuprate / diethyl ether; pentane; tetrahydrofuran / 1 h / -78 °C 1.3: 82 percent / diethyl ether; pentane; tetrahydrofuran / 2 h / -78 °C 2.1: 99 percent / Et3N / methanol / 15 h / 115 °C / 2850.23 Torr View Scheme