1.1: LDA / tetrahydrofuran; hexane / 0.5 h / -78 °C 1.2: 73 percent / HMPA / tetrahydrofuran; hexane / -78 - 20 °C 2.1: AIBN / acetonitrile / 0.25 h / 100 °C 3.1: Raney-Ni / ethanol View Scheme

1.1: LDA / tetrahydrofuran; hexane / 0.5 h / -78 °C 1.2: 90 percent / tetrahydrofuran; hexane / 1.33 h / -78 - 23 °C 2.1: AIBN / acetonitrile / 0.25 h / 100 °C 3.1: Raney-Ni / ethanol / 20 °C View Scheme