1: 2,3,4,5-tetraethyl-1-ethynylphosphole With ethylmagnesium bromide in tetrahydrofuran T=20°C; 3 h; 2: 1-chloro-2,3,4,5-tetraethylphosphole in tetrahydrofuran T=20°C; 2 h;

1.1: 772 mg / tetrahydrofuran / 1 h / 20 °C 2.1: ethylmagnesium bromide / tetrahydrofuran / 3 h / 20 °C 2.2: 1.16 g / tetrahydrofuran / 2 h / 20 °C View Scheme

in tetrahydrofuran T=20°C; 1 h;

ethylmagnesium bromide in tetrahydrofuran T=20°C; 1 h;