1: With diethylzinc; trifluoroacetic acid in dichloromethane T=0°C; 0.333333 h; 2: diiodomethane in dichloromethane T=0°C; 0.333333 h; 3: 3-bromo-3-buten-1-ol in dichloromethane T=0 - 20°C; 4 h;

1: diiodomethane With diethylzinc; trifluoroacetic acid in dichloromethane T=0°C; 0.666667 h; 2: 3-bromo-3-buten-1-ol in dichloromethane T=0 - 20°C; 4 h;

pyridine in dichloromethane T=20°C; 16 h;