1: With isopropylmagnesium chloride in tetrahydrofuran T=20°C; 0.5 h; 2: With sulfur dioxide in tetrahydrofuran T=-40°C; 0.5 h; 3: With sulfuryl dichloride in tetrahydrofuran T=-40 - 20°C;

1: With n-butyllithium; Di-n-butylmagnesium in tetrahydrofuran T=-11 - -10°C; 2.66667 h; Inert atmosphereLarge scale reaction; 2: With sulfuryl dichloride in tetrahydrofuran; toluene T=-12°C; 1.58333 h; Large scale reaction;