isopropylmagnesium chloride in tetrahydrofuran T=-30°C; 0.5 h;

1: 70 percent / N-iodosuccinimide / acetic acid / 18 h / 20 °C 2: 85 percent / i-PrMgCl / tetrahydrofuran / 0.5 h / -30 °C View Scheme