1: 91 percent 2: Na(Hg)x,NaH2PO4 View Scheme

lithium; ethylamine 1.) benzene, 110 deg C, 96 h, 2.) -78 deg C, 96 h; Multistep reaction;

Multistep reaction;

n-butyllithium in tetrahydrofuran; hexane T=0°C; 1 h;

1: 88 percent / ethyl acetate / -35 °C 2: 15.6 percent / hydrazine (97percent), hydrogen peroxide (30percent) / ethanol / 1) 0 deg C, 30 min, 2) room temp. 4: 59 percent / acetone / 2 h / Irradiation View Scheme